U-shaped lock on the brake disc. It can be used as an independent lock, or together with a chain. The thickness of the steel shackle is 14mm. The shackle is attached to the lock body with two bolts.
The smooth silicone surface of the lock prevents scratches.
Manually opening and closing keyhole cover against dirt and corrosion.
The kit includes a Roll Up cable, which prevents starting from a place with a locked lock.