The Abus Ultra Mini 410 U-Lock provides compact security at a steal of a price. Its 12 mm diameter temper-hardened steel shackle is double-bolted and continues through the lock body for maximum strength and theft-resistance. Patent-pending double-layer wafer cylinder technology thwarts lock picking and a soft touch cover on the shackle protects the paint on bike frames. The 5.5 x 3 18 locking area allows ample room to lock through either the frame or a wheel.