Commando Lock 44IC3BKD IC3 Tactical (Ichange with Shackle Guard), Black, 44 mm Incorporates our iCHANGE technology to allow shackle guard installation and removal in seconds without tools Boron alloy shackle is 50% stronger than conventional case-hardened steel and exceeds ASTM Grade 6 cut resistance when used with the IC3 Tactical Shackle Guard! SolidbodyTek interlocked and riveted steel plate construction for strongest padlock assembly Chamfered rivet holes prohibit lock fracture by chiseling the rivet heads off Dual hardened stainless steel ball locking mechanism defends against prying and hammer blows and cant be shimmed or bypassed Highly pick resistant Commando high security 5 pin cylinder with anti-bump technology and up to 10 security pins is standard Non marking rubber bumpers protect your items from scratches Exceeds ASTM F883-09 Standard Performance Specifications for Padlocks RoHS (Reduction of Hazardous Substances) compliant