Machine Screw Kit, 600 piece(s), Round head, Phillips/Slotted/Square drive type, including a(n) #3 Square Power Bit 2 in. Long and (200) #10-32 x 1 in. Round Head Tri-Drive Screw - Zinc and (200) #10-32 x 1/4 in. Round Head Tri-Drive Screw - Zinc and (200) #10-32 x 1/2 in. Round Head Tri-Drive Screw - Zinc