Commando Peacemaker Solidbody technology is behind the quality and strength of every lock we build. Named in honor my inventor father's company, each carbon steel plate is precisely interlocked to the next under nearly 100 tons of pressure before riveting at final assembly to create the strongest laminated lock design in the industry. Designed for US military use, each lock has a high security 5 pin cylinder (Y52 Keyway Standard) with anti-bump technology and up to 10 security pins for extreme pick resistance. 2 non marking rubber bumpers will not crack or fade while protecting your investment. Commando fully hardened boron alloy shackle is standard. All Commando locks are shim and bypass proof. A better lock at the best value. Locksport approved. RoHS (Restriction of Hazardous Substances) compliant.