OnGuard offer some of the best quality locks you can get. Most of their range is "Sold Secure" and the OnGuard Pitbull STD 8003 is at the Gold level of this grading system. This model from OnGuard offers $2251 cover for bicycles and $751 for power sports vehicles once you have registered your lock on their website. Features: Versatile D lock Bicycle security for high crime areas, with a standard length shackle115mm x 230mm x 14mm hardened steel shacklePatented deadbolt locking mechanism for extensive holding powerHigh security disc style cylinderReinforced sleeve over crossbar and cylinder provides enhanced security protectionReinforced internal housing increases resistance to twisting and leverage type attacksNew user friendly, pick, pull and drill resistant onguard Z-key cyclinder featuring bumpblok, offers optimum deterrent against physical attacksThe quattro bolt locking mechanism provides unqualed strength and maxiumum pull resistance by locking the cross bar to the shackle on 4 sidesAnti-Rattle bumpers keeps the shackle snug against the crossbar and prevent unnecessary noise5 keys including one with a light to help locate the lock barrel at nightAll tube quick release multi-position mounting bracket. Will fit 99% of all bikes on the marketThe mounting system allows for 360 degree rotation providing the ability to micro-adjust the lock angle to better fit and align with a bike frames specific geometry Double rubber coated and weatherproof