U-Lock lock Kryptonite KryptoLok Standard with high protection.12.7 mm hardened steel horseshoes Sold silver Secure double lock Vinyl surface, leaves no scratches on bike frame Two keys in lock set Key Safe program (new key can be ordered) Frame attachment Protection level 6 out of 10 Diameter: 12.7 mm Dimensions: 10.2 x 22.9 cm .