‎Master Lock Excell No. The M187EURD disc lock features a 60mm wide titanium-stainless steel reinforced body for maximum strength, reliability, and corrosion resistance. The fully covered design minimizes exposure to cuffs and protects against bolt-cutter attacks. The 8mm diameter octagon clamp is 24mm long and is made of cut boron carbide, which is 50% stronger than reinforced steel, providing maximum cutting and sawing resistance. The four-pin roller prevents pick-up and the dual ball bearings provide maximum resistance against squinting and knocking. The covered keyway provides maximum protection from the weather and a reinforced body bumper that protects against scratches. The limited lifetime warranty provides peace of mind from a brand you can trust. This lock is ideal for self-storage units, sheds, trailers, moving trucks, pickup trucks, and more. The limited lifetime warranty provides peace of mind from a brand you can trust.‎