Master Lock Company continues to be the industry leader in portable security products by building on its already reputable quality and selection. In 4 easy steps, the Build Your Lock tool allows you to select your desired padlock and tailor it to your specific application needs. With every modification, the padlock image and price conveniently adjust.


Learn which padlocks can be built to match the key you already have. Each padlock has its own specific key number typically located on the key head. Most key numbers are supported by this application.
Browse through our different categories of padlocks you can customize and build to your own specifications. CHOOSE
Enter the padlock number you wish to customize. Most lock numbers are supported by this application.

Custom Built. Commercial Quality. Complete Security.

Master Lock, the worldwide leader in portable security products, continues to set the standard for quality and selection. Building on this tradition, Master Lock ProSeries® and Commercial padlocks can be customized to meet your specific needs. Our make-to-order capabilities allow us to create tailored security solutions for your applications. Choose the best width, material, shackle diameter and length, product weatherability, as well as multiple keying options or laser engraving to secure your property.