?Scope of use?Bicycles or motorcycles with disc brakes, battery cars, etc.! The disc brake lock hole must be larger than 5.5mm, and the disc brake disc with the disc brake hole less than 19mm from the edge can be used! Product size; bottom length 60mm, width 25mm, height 53mm, top length 35mm! It weighs about 300g and can be used with a reminder rope (length 1.3M)!. ?Easy Locking?Lock without a key, easy to press to lock. ?Bullet key?The key and the lock core are mature and stable, the design is precise, and it is difficult to copy. The gap between the lock slot and the blade is 0.05mm, and the spring and blade adopt a bilateral balance method. As long as either side is stressed, it cannot be opened! Effective anti-theft! (2 random keys). ?Bullet lock cylinder? Buy a car to look at the engine, buy a lock to look at the lock cylinder, the bullet lock cylinder is anti-multifunctional key, anti-tinfoil opening, prying, anti-hook, anti-technical unlocking! The alloy blades are used inside to enhance the anti-drilling performance!. ?Alloy material? The lock body is made of high quality zinc alloy casting, high quality and environmental protection, strong and durable,The lock body is formed in one piece, without any splicing, strengthened firmness, anti-smashing, anti-hydraulic clamp, waterproof, anti-drilling, and no rust! fine workmanship pursuit of fashion easy to use.