aluminium shell zinc inside cylinder lock 1 material: brass, AL, iron, zinc ... 2 different surface finished 3 60mm,70mm aluminium shell zinc inside cylinder lock Material: Brass, Zinc Alloy, Iron, Al, ... button, oval button ans so on. key way:S-groove key (normal key)Computer keySurface finishing :Gold plated, chrome ... copperHPhalf picks cylinder OCoval cylinder aluminium shell zinc inside cylinder lock