bolt feature: 1.Material: solid brass 2.64mm length 3.US3 finish 4.Blister package 5.weight: 52ginstructions: 1.place bolt in desired location and mark screw holes 2.dill 5/64" pilot holes. 3.install and tighten screws. 4.position strike on jamb opposite of bolt and mark screw holes 5.mortise jamb for bolt acceptance 6.install and tighten screw.