The Oxford Monster Disc Lock is packed with features.. Specifications include 11mm hardened Ni-Cr-Mo alloy steel shackle Double locking mechanism with 2 hardened steel balls Can also be used with a chain "One Touch" keyhole dust cover Widened access to disc, enabling much easier fitment Lifetime Guarantee Thatcham Approved Sold Secure 101:2020 Motorcycle - Gold Sold Secure 102:2019 Quad & ATV - Gold Sold Secure 106:2013 Motor Scooter - Gold