Our new lock guard is designed to protect key-in-knob locks against pipe wrench and beating attacks. The base plate measures 3-1/2” square and will accommodate locks with rose diameters up to 2-11/16 inches, guard projection is 3 inches. Four 1/4” carriage bolts are supplied for mounting on doors up to 1-3/4 inch thick. Finish is an exterior silver powdercoat. Best results are obtained using a storeroom function lock.