Bicycle part 1)Good quality&High security 2)Horse shoe type 3)Computer key 4)Useful life test no less than 3000 times Model NoGR960KeyNickel plating Lock housingAluminum alloy die-castings / Spraying plastic( gray, black)Cover plateChrome platinglock cylinderNickel plating Lock ringΦ10mm ,steel / chrome plating Included side13mm, 16mm, 19mmAccessoryScrew: M4×12mm×2piecePackage1pc/poly bag, 40pc/ ...