Otis Technology Pro Plus, Gunsmithing Punch Set, Brass, 5 Piece FG-935 For all your at-home gunsmithing needs" this gunsmithing punch set gets the job done. Includes 5 brass 4" long pin punches sized 3/32" 3/16" 5/32" 1/8 & 1/4. Assemble/disassemble firearms" install/remove solid pins" align parts" hold springs in place and more. Made from corrosion resistant brass and hex machined. The chamfered striking surface reduces burring. Machined in the USA.