Use these set screws in confined areas, where there is no room ... protruding head Female hex drive Black oxide finish •Use these set screws in confined areas, where there is no room for ... not included.Coarse sizes: 1/8"-40 x 3/16", 5/32"-32 x 3/16", 3/16"-24 x 1 ... 4", 1/4"-20 x 3/8", 5/16"-18 x 3/8", 5/16"-18 x 1/2", 3/8"-16 ... 1/4"-28 x 1/4", 5/16"-24 x 3/8", 3/8"-24 x 3/8" 150 Piece Set Screw Assortment