Pachmayr Master Gunsmith Hex Head Ring and Base Screw Kit, 142 Piece

Hex Head Ring and Base Screw Kit contains #6-40 Fillister Head (3/8, 1/2), #6-40 Oval Head (1/4, 3/8), #6-48 Fillister Head (1/4, 3/8, 9/16), #6-48 Oval Head (1/4",3/8") #8-40 Fillister Head (1/4,3/8,1/2), #8-40 Oval Head (1/4,1/2).