Designed to be a medium-to-high security U-Lock that you can actually afford The shackle and locking stock are coated to protect your bike The seat post mount includes a push button to let you know the lock is secure and won`t go flying off mid-ride like Mario Kart for your fellow riders 4.5x7.5`/11.43x19.05cm STD Black 5 of 10 Included 35010UPC/EAN/GTIN: 815189020691