● Stainless Stell pin & double line syetem ●Solid brass lock body with brass inner mechanisms ●All pins are made of stainless steel ●Removable core cylinder ,in case of key loss, no need to change the whole lock but change the cylinder only. ●Over three hundred thousand(300,000) compose ●Prenents of the pick tools & Drill resistance ●Lock are available for Master Key,Key Different,or Key Alike