Description Made ofcarbon steel and zinc alloy material, anti-rust, strong and durable for use, not easy to break, wear-resistant, weather resistant, long serving life. It can be used to lock your bike, bring huge convenience when you are riding at outdoor, and prevent your bike from stolen. Features -Color:Black -Material:carbon steel, zinc alloy-Size:18.00X13.00X2.60cm/ 7.07X5.11X1.02in- Keys unlocking, easy and convenient for use, no need to set the password and will not afraidof forgettingthe password.- Compact size and portable, easyto carry around without too much burden.- An gift choicefor any bike lover, provide them an way to lock their bike.- U shaped lock for bike, and comes with a quick-release installation buckle, you can easilyattach it on your bike.- Dont risk your bike getting stolen, use it to protect your bike, cut-resistant, leverage-resistant and drill-resistant. Packing list: 1 x lock1 x quick-release installation buckle2 x keys