OnGuard 8010c Lock\nShackle: 4.53\"" x 9.06\"" (115mm x 230mm)D: 0.51\"" (13mm) \nCombination Lock\nMassive 13mm ULTRA HARDENED STEEL SHACKLE to provide MAXIMUM cut RESISTANCE\nQUICK RELEASE Multi-positioning Mounting bracket included\nULTRA-HARDEDNED reinforced Crossbar\nANTI-RATTLE Bumpers\nSet your own 4 Digit combination(10,000 variations so no keys to lose of forget)\nDouble rubber coated crossbar to protect your frame from scratches\nSteel Ball click combo gear system offers high security with superior protection from pick and pull attacks\nIT IS ADVISED TO OIL THE LOCKING MECHANISMS WEEKLY IF YOU USE THE LOCK ON A DAILY BASIS. IF THE LOCK ISN'T LUBRICATED PROPERLY THEN IT WILL START GETTING STIFF  OR SEIZING UP, THEN WE RECOMMEND LUBRICATING MORE OFTEN UNTIL CURED__________________________________________________________________\nFor more information please contact usHopkinson CyclesQueen StreetHorbury, WakefieldWF4 6LP\n\nFor contact information or technical u