Master Lock 3NKALF-10 Keyed Alike Locks with BumpStop Technology — 10 Locks, 20 Keys

Ten padlocks keyed alike with a single master key for streamlined security

This ready-to-use set bundles ten padlocks that all open with one key, accompanied by twenty keys for convenient distribution among trusted users. Ideal for outdoor storage sheds, gates, lockers, and shared equipment, the kit emphasizes practical convenience while preserving basic security fundamentals. The design supports everyday use in variable conditions, so you can lock up multiple points without juggling a large set of keys.

Key technology and rugged construction sit at the core of the kit. It features a 1-9/16 in (41 mm) wide reinforced laminated steel body, a compact 1-1/2 in (38 mm) tall shackle, and a 9/32 in (7 mm) diameter shackle. The BumpStop Advanced Cylinder Technology uses a reverse rake tapered driver pin and high-performance springs to limit cylinder movement during bump attempts, helping keep the core from turning under abnormal force.

• Includes TEN padlocks keyed alike and twenty keys for broad access control.
• Patent-pending BumpStop design reduces rotation during bump attempts for added resilience.

Durability features support long-term use in outdoor or high-traffic settings. Dual ball bearings locking provide greater pry resistance, while hardened steel bottom plates bolster drill resistance. Top and bottom bumpers help withstand scratches and scuffs from routine handling and weather exposure.

• Dual ball bearings and a 4-pin tumbler cylinder contribute to reliable core security.
• Bottom plates and bumpers protect against wear from outdoor environments.

Real-world scenarios benefit from a single-key approach: share access with teammates, contractors, or family members for gates, storage lockers, tool chests, and rental spaces. The twenty-key allowance supports flexible administration when access needs change, while the compact form fits on fences, hasps, and other common mounting points. While designed to endure sun, rain, and dust, the system invites thoughtful use rather than guarantees of any outcome.

Warranty and assurance come from Master Lock: this set carries a limited lifetime warranty, underscoring the brand’s commitment to long-term performance and service support.