The OnGuard RockSolid 8580 is a Sold Secure Diamond-rated lock that is claimed to resist angle grinders making it ideal, in theory at least, for securing high-end road, gravel and electric bikes.
SHARON, Mass. (BRAIN) — OnGuard says its RockSolid u-lock is the world's lightest angle grinder-resistant lock. The lock features a proprietary coating that is a blend of ceramic and diamond and ...