ANTI ANGLE-GRINDER D LOCKUltimate Security with angle-grinder resistance20mm graphene reinforced premium hardened steel shackleSold Secure Diamond Motorcycle & Bicycle ratingsTHE GRIND IS OVER.The weapon of choice for the professional bicycle (and motorcycle) thief is the angle grindera motorized hand tool that can cut through any lock, no matter how big, how heavy, or how expensive. To date, this fundamental problem has been largely ignored by the security industry as it has seemed too difficult to solve.That has changed with the release of the Hiplok D1000, a lightweight, mobile lock that can withstand severe, sustained angle grinder attack.The reason for the D1000s incredible resistance against motorized attack is a material called Ferosafe, a composite graphene material that effectively resists high power angle grinders due to its unique chemical and physical properties.The application of Ferosafe within the D1000s patent pending design results in a lightweight, mobile bicycl