burglarproof lock cylinder,lock coreMaterial: Brass, Zinc Alloy, Iron, Al, etc.Length: 40mm,50mm,60mm,70mm,80mm,83mm,90mm,100mmCam : sintered steel ( very hardened ) Key : iron key or brass key 3pcs /set , 5pcs /set Lock core: brass or zinc Sealed bead: brass and iron ( we can do 5 or 6 pcs hoodles by customers' requirement) Knob: ..