Lyman's Masrer Gunsmith Hex Head Ring and Base Screw Kit contains 10 each of 14 premium 3/32" hex style scope ring and base screws. It comes packaged in a handy storage box with individual compartments for each size screw. Includes tweezers and a thread size gauge, which also doubles as a shortening jig used to grind a screw to a shorter length. Contains 10 each of 14 premium 3/32 inches hex style scope ring and base screws. These difficult to find screws are favoured non-slip replacements for slotted screws. Packaged in a handy storage box with individual compartments for each size screw. Includes tweezers and a thread size gauge, which also doubles as a shortening jig used to grind a screw to a shorter length.