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…