These difficult to find screws are favored 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. Kit contains: (Hex size: 3/32) #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)