Master Lock 6121 padlock, keyed alike, long shackle, rectangular body

Master Lock 6121 padlock for keyed-alike access

The Master Lock 6121 is a rectangular-bodied padlock supplied in a keyed-alike set so one key opens every lock in the group. It suits facilities teams, site managers and homeowners who need multiple entry points secured with a single credential. The laminated steel body and boron-alloy shackle resist cutting and prying, while the weather-resistant finish protects the mechanism in outdoor conditions. Rekeyable cylinders allow the system to be updated without replacing the hardware.

Keyed-alike convenience with Master K6000 keyway

All units in the set operate with key number 10G202 cut to the Master K6000 keyway, eliminating the need to carry or manage separate keys for each padlock. The five-pin cylinder provides standard pick resistance and can be rekeyed by a locksmith if access requirements change. No control key registration is required, simplifying initial deployment. The long shackle clears thicker hasps, chains or gate latches that a standard shackle cannot reach.

Five-pin security and shackle dimensions

The 5/16-inch diameter boron-alloy shackle with a 2 1/2-inch vertical clearance fits most industrial hasps, chain links and gate hardware. The five-pin cylinder resists casual picking but is not rated for high-security key-control programs. Users needing restricted keyways, interchangeable cores or higher pin counts should specify a different product line. The lock performs reliably on sheds, storage units, utility boxes and perimeter gates where keyed-alike management is the priority.