Tough-Cut™ octagonal boron-carbide shackle is 50% harder than hardened steel. 48mm wide laminated steel core with weather resistant cover, shackle seals, and keyway cover protects against snow, rain, dirt, mud, grime and salt. Dual ball bearing locking for maximum pry resistance. 4-pin cylinder for increased pick resistance. Keyed Alike - Same key opens all three locks. Package of 3. Black.