Master Lock 21KA-10L320 Keyed Alike Padlock 1-3/4 in

Product Description

The MASTER LOCK 21KA-10L320 is a laminated steel padlock built for maximum-security applications where keyed-alike convenience is required. The body measures 1-3/4 inches wide and is constructed from layered laminated steel, providing high resistance to cutting and impact. The hardened steel shackle measures 5/16 inches in diameter, 3/4 inches in width, and 15/16 inches in height, delivering a tight clearance profile that limits tool access. A 5-pin tumbler cylinder adds pick resistance. This padlock is specified by facilities managers, contractors, and security professionals who need multiple locks sharing a single key.

This padlock is suited for securing equipment enclosures, gate hasps, tool storage, job-site lock boxes, and chain barriers in both residential and commercial settings. The keyed-alike configuration makes it practical when a single worker or crew needs to operate multiple locks without carrying separate keys. Its compact shackle clearance makes it a strong fit for applications where exposed shackle length is a vulnerability.

Key Features

• Laminated steel body construction for high cut and impact resistance
• Hardened steel shackle, 5/16 inches in diameter with 15/16 inches of clearance
• Keyed alike — multiple units operated by the same key
• 5-pin tumbler cylinder for enhanced pick resistance
• Compact shackle profile limits prying and tool attacks
• Maximum security padlock classification

Compatibility

Designed as a keyed-alike replacement or add-on padlock compatible with standard hasp, chain, and latch hardware accepting a 5/16-inch shackle diameter.

Installation Notes

Installation requires no tools beyond confirming the hasp or latch hardware is compatible with the shackle dimensions. Inspect the mounting hardware for wear or damage before installing a new padlock. Store keys securely and verify the keyed-alike grouping code matches other locks in the set before deploying in the field.