Ultimate protection for high crime areas. X4p quattro locking mechanism for 4 sided protection. Massive 16.8mm hardened steel triradius shackle resists all forms of cutting prying or jacking and provides extra room for more locking options. Crossbar and shackle coatings protect finishes. X4p quattro bolt locking mechanism locks shackle on four sides z cylinder is bump proof and resists picking pulling or drilling triradius shackle creates more internal space for locking versatility massive 16.8mm hardened steel shackle resists cutting prying and jacking rounded design and centred keyway eliminates pry points co moulded crossbar cover and double rubber coated shackle protects finishes all metal end caps provide additional protection against hits and drops automatic keyway covers helps seal lock internals against the elements locking mechanism x4p quattro bolt tumbler mechanism z cylinder european type shackle diameter 16.8mm hardened steel coatings co moulded crossbar cover with metal end caps. Double rubber coated shackle cover keyway automatic weather resistant keys 5 laser cut keys 1 with led micro light warranty lifetime extras all tube mounting bracket included