Privacy Policy

As your privacy is important to us, has prepared this privacy web page so that you may better understand how your personal information is used in connection with  online services. Please take the time to review this page and contact us at with any questions or concerns.
This Statement of Privacy & Security applies to  Throughout the United States, Canada and Columbia SDH Hardware is committed to value, quality and exceptional customer service.

Shandong Double-Hill Electronic Lock Company was founded in 1986 selling low cost locks and was certified ISO9002 in 1999. Today, Double-Hill manufactures solid brass door hardware, marketing a complete line of high-end decorative hardware, which includes handle sets, knobs, levers and dead bolts for residential and light commercial applications. Electronic handle sets round out the line for the high quality hotel/motel industry. Double-Hill is the top selling hardware company in China.

Door hardware is the first thing that visitors touch and feel when entering your home. Double-Hill entry door hardware set the tone for the rest of the house. With SDH Hardware, you get the security you need without the sacrifice of style or functionality.

 offers a wide variety of styles and finishes at a great value: Double-Hill Tubular and Mortise Handle Sets
* E-Series and MD Series Double-Hill Keyed Knob and Lever Sets
* D1100 Series Double-Hill Decorative Keyed Sets
* DK Series Double-Hill Dead Bolt Set
* DB Series Double-Hill Euro-Style Decorative Sets
* IC Smart Chips and Magnetism Cards

Look for Double-Hill products at home improvement retailers, door hardware distributors and quality homebuilders, as well as numerous websites throughout the nation.

  is a subsidiary of the American branch established in 2015. Double-Hill products are manufactured in China. Sales Representatives are available throughout the United States with Customer Service located in the corporate office. The corporate office and large distribution center is located in ANAHEIM, California. Double-Hill - Elegance in Door Hardware.’s family of Web sites, customer telephone surveys, product registration cards and customer support helpdesk communications and governs data collection and usage at all of these CA BLUEBIRD DEVELOPMENT CO.,LLC sites and services.  provides a general audience web site. Personal information of all users is collected, used and disclosed as described in this Statement of Privacy & Security.

Collection of your Personal Information
 may ask you to register and provide personal information in certain instances, such as when you purchase products from the Specialty Store, register new products, enter a contest or sweepstakes or sign into a page that requires authorization. may also collect financial information to bill you for products and services that you purchased online.

This personal information may include your name, e-mail address, user ID, address and telephone number.  may also collect demographic information, such as your age, gender, zip code, education level, household income, preferences, interests, favorites and whether you are a personal or business user.

Collection of Other Information
 automatically collects on our server logs certain information about your computer hardware and software when you visit our Web site or use online services, This information may include: your IP address, cookie information, globally unique identifier system, operating system, browser type, domain names, access times, service provider and referring Web site addresses. This information is used by  to monitor the operation of our Web site and online services and the use of its products, to maintain quality of the service, and to provide general statistics regarding use of our products and our Web site.
 also tracks the usage of visitors to our Web site, including the URL of the visitor’s previous Web site and when they exit our Web site.also keeps track of the pages our customers visit within our Web site and any transaction details (downloads, orders, requests or referrals) in order to determine what  products, information and services are the most popular. This data is also used by to deliver customized content and advertising to customers whose behavior indicates that they are interested in a particular subject area.  uses various technologies to track trends in the use of our website or online services, including session cookies and GUIDs. These allow us to track how consumers interact with  online and with your permission this information can be tied to your personal information to help us tailor communication to you.

Use of your Information
With your express permission,  collects, integrates and uses this personal and other information to help you quickly find software, services or information on, to help us create Web site content and other services most relevant to you and to alert you to product upgrades, special offers, newsletters, updated information and other new services from When  receives information about your session or about you, we may use it for research or to improve our site and the services we offer you. We may also use this information from time to time to monitor the technical functions of our servers and site. uses this information to communicate with you only after you give your express permission for such communication. Global Interlok does not share this information with any third parties, except with your consent or as described below.

If you choose not to register and provide this information, you can still use most of  ’s services. Unfortunately, you will not be able to access areas that require registration.

If you do not want to send you e-mail or postal mail regarding   products or services, you may opt out when you register by selecting the option stating that you do not wish to receive such marketing materials from by selecting the option stating "Check here if you do not wish to receive  mailings".

We occasionally hire other companies to provide limited services on our behalf, such as handling the processing and delivery of mailings, providing customer support, processing transactions, or performing statistical analysis of our services. We will only provide those companies the personal information they need to deliver the service. They are required to maintain the confidentiality of your information and are prohibited from using that information for any other purpose.

We from time to time supplement the information we collect from the site with information from offline or third party sources. We use this information to enhance or overlay the ’profile’ of customers and business contact information. This supplementary data is therefore tied to corporate contact information and in some cases personally identifiable information.

We also may internally compare lists collected from our other sites or within our family of companies to remove duplicate entries.
 may access and/or disclose your personal information if required to do so by law or in the good faith belief that such action is necessary to: (a) conform to the edicts of the law or comply with legal process served on  or its Web site; (b) protect and defend the rights or property of  , including its Web site; or (c) act under exigent circumstances to protect the personal safety of users of  ’s web sites, or the public.

Personal information collected on this site may be stored and processed in the United States or any other country in which   or its affiliates, subsidiaries or agents maintain facilities, and by using this site, you consent to any such transfer of information outside of your country.  abides by the safe harbor framework as set forth by the U.S. Department of Commerce regarding the collection, use, and retention of data from the European Union.

Control of your Personal Information
Global Interlok offers its customers choices for the collection, use and sharing of personal information at the time the customer decides to register. In addition, you may also stop the delivery of future communication from by unsubscribing at any time. For instance, each email you receive contains instructions explaining how to stop receiving such e-mails.

Correcting/Updating/Deleting/Deactivating Personal Information

If a user’s personally identifiable information changes (such as zip code, phone, email or postal address), or if a user no longer desires our service, we provide a way to correct, update or delete/deactivate users’ personally identifiable information. This can be done by emailing our Customer Support at

Security of your Personal Information
 is committed to protecting the security of your personal information. We use a variety of security technologies and procedures to help protect your personal information from unauthorized access, use, or disclosure. For example, we store the personal information you provide on computer systems with limited access, which are located in controlled facilities. When we transmit highly confidential information (such as a credit card number) over the Internet, we protect it through the use of encryption, such as the Secure Socket Layer (SSL) protocol.

Collection and Use of Children’s Personal Information
We do not knowingly collect personally identifiable information from users under the age of 13. If for some reason we are made aware we have such personal information we will take reasonable steps to delete that information.

Like many other companies,   uses cookies to help you personalize your online experience. We use both session and persistent cookies. A cookie is a very small text file placed on your hard drive (with your permission) by a web page server. It is essentially your identification card, and cannot be executed as code or deliver viruses. It is uniquely yours and can only be read by the server that gave it to you. Cookies are used by Global Interlok to; for example, when sending you e-mail we may use cookies to tailor the email content to your interests. When you initiate a response by clicking on a link within an e-mail message, you are re-directed onto the Internet. We then record your individual response to help us deliver information that is more relevant to your interests. This saves you time as it helps Global Interlok remember who you are. It makes your subsequent visits to simpler and more seamless. You can set your browser to notify you when you receive a cookie, giving you the opportunity to decide whether or not to accept it. However, on some pages which require authorization, cookies are not optional. If you choose not to accept cookies, you will likely not be able to access these pages.


What is a GUID?
A Globally Unique Identifier (GUID) is an alphanumeric identifier used to indicate a unique installation of a product, and is found in many popular software applications such as web browsers and media players.may use GUIDs for aggregate statistical analysis, to personalize products and services.

s Use of GUIDS in LDM products and in future products

LDM randomly generates a GUID during installation.  uses publicly documented standards to generate GUIDs. From time to time, may use a GUID with a unique set of numbers in order to gather and aggregate information about traffic patterns, such as how many times a user attempts to access content from a server. These statistics help us improve our services.

We may collect data marked by GUIDs in order to understand aggregated traffic patterns and other  usage patterns. We use this data in order to measure product performance, better understand types of content that are popular with our users and how our products are used and to conduct user surveys. We may relate GUID marked system data to other personal information supplied by users. The system information that is linked to your personal information is limited to information about the types of  products you have connected to your computer. Further, consistent with our privacy principles,  does not sell or share such information with any third party unless we obtain a user’s advance informed consent.

 will periodically send our registered users e-mail messages about our products and services. When sending you e-mail, we may use an image called a single pixel GIF that allows us to format messages tailored to your computer’s capabilities. We also use this technology to determine, in the aggregate, how many people open our e-mails. When you initiate a response by clicking on a link within an e-mail, you are redirected on to the Internet. We then record your individual response to help us deliver information that is more relevant to your interests.

 will occasionally update this Statement of Privacy to reflect company and customer feedback. When posts changes to this Statement, you will see the word "updated" next to the Privacy Statement link on the front page of   If there are material changes to this Statement or in how CA C will use your personal information,  will prominently post such changes prior to implementing the change. encourages you to periodically review this Statement to be informed of how  is protecting your information.

When CC receives information about your session or about you, we may use it for research or to improve our site and the services we offer you. Thank you for your interest in  and our products..

© Global Interlok, inc. 2021