Commando Marine grade brass locks are built for extreme environments. After 28 quality checks, every lock is hand polished to a bright shine. No laquer finish is greener and means you can repolish your lock any time. 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. 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.