ONGUARD Bulldog DT 5012 Bicycle U-Lock and Extra Security Cable X2 Power Double Bolt Locking Mechanism locks shackle on both sides M-Cylinder resists all attacks from picking, pulling or drilling Popular 115mm x 230mm (4.53 x 9.06) shackle length. 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