X2 Power Double Bolt Locking Mechanism locks shackle on both sides * M-Cylinder resists all attacks from picking, pulling or drilling * Smaller shackle and narrower crossbar save weight. 5 Laser Cut Keys, 1 with a LED micro-light. * Included 120cm x 10mm (4? x 0.39?) fully coated, braided steel cable provides more locking options * Hefty 13mm (0.51?) hardened steel shackle resists cutting, prying and jacking