... lock cylinder good qualityMaterial: Brass, Zinc Alloy, Iron, Al, etc.Length: 40mm,50mm,60mm,70mm,80mm,83mm,90mm,100mmCam : sintered steel ( very hardened ) Key ... , rhombus button, oval button ans so on. key way:S-groove key (normal key)Computer keynice polished lock cylinder---- Surface finishing :Gold plated, chrome plated ...