Description Sturdy Waterproof Design Lock: The disc lock is made of high-quality heavy-duty alloy steel body and smooth surface with advanced technology. Super Class B lock cylinder, prevents saw tearing, lever opening and canopy opening. Hardened carbide reinforced steel locking pins are water resistant so they will never rust in the rain. EASY NOTIFICATION WITH RETURN CABLE: The included disc booster cable will remind you to remove the disc lock when exiting your beloved scooter. Prevents potential damage from movement when engaging the drive lock. EASY TO USE: The disc brake lock features a simple push-to-lock system. The keys are stainless steel and ergonomically designed to reduce torque and prevent them from bending or breaking. Wide Application Fields: This disc lock is suitable for most electric scooters, 5mm pin diameter is suitable for most disc brakes. Buy insurance for your goods, such as Xiaomi Mijia M365, Ninebot ES series scooters. package: includes 1 scooter disc, 2 keys, a special bracket with screws to mount the bracket on the scooter's bar.