Master Keys work with XA style locks. Used to open all keyed differently BankSupplies fabric bag locks Heavy duty master keys are built to withstand years of use. Master keys for fabric locking bags come pre-cut to save time and money spent at a locksmith. Master Keys for Fabric Locking Bags are used for complete access to any fabric bag XA style lock. All keys are built to withstand years of use and come pre-cut to save time and money spent at a locksmith.