Key characteristic:iron tubular key or brass tubular key, higher safty tubular zinc alloy M12-10-1 key switch safety: Model:M12- ... 10Main material: Zinc alloy,Brass;Key characteristic:iron tubular key or brass tubular key, higher safty,Coating: Bright chrome or nickel ... ,all kinds of cabinet, vending machine,furniture, Duty room etc. tubular zinc alloy M12-10-1 key switch safety