Introducing the OnGuard RockSolid, a state-of-the-art bike lock designed for maximum security against determined thieves. Utilizing advanced materials and technology, this lock features a robust shackle and innovative locking mechanisms to create an impenetrable barrier.X4P Quattro olt locking mechanism secures the shackle at four points for enhanced protection. Z-Cylinder is bump-proof and resistant to picking, pulling, and drilling. 15mm hardened steel shackle coated for resistance against angle grinders, prying, and jacking. Weather-resistant features ncluding a centered keyway, all-metal end caps, and an automatic keyway cover to extend durability. SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us