The Master Lock Secure D Lock offers a solution for every application. Whether you are looking for affordable protection or optimum security, there is the perfect product. The hardened steel and special steel alloy shackles will resist the strongest attacks and their tumbler cylinder locking is both anti-drill and anti-pick. Furthermore, with the added feature of a dust cover you can leave them out in the elements with confidence.Master Lock Secure D Lock Features210/280mm shackle, 110mm shackle clearance13mm Hardened Steel high performance shackle offers added protection against cuttingThermoplastic cover prevents scratchingDouble Locking cylinder for superior pry resistanceInnovative rotating keyway dust cover for optimum weatherabilityHigh Security tumbler cylinder for added pick resistanceCarrier Bracket included for convenient storage