Commando iCHANGE Series military grade padlock with interchangeable shackle system is really 2 locks in 1. Our patented removable shackle system gives you the choice of installing a standard 1-1/8" shackle or long 2-3/4" shackle at any time for more uses. 3 second changeover with just the turn of the key. No tools required. Commando Solidbody Tek interlocked and riveted lock body has 15% more steel that conventional lock designs to protect against sledge hammer blows. 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. All Commando locks are shim and bypass proof. A better lock at the best value. locksport Approved. RoHS (Restriction of Hazardous Substances) compliant.