Machine Screw Kit, 375 piece(s), Round head, Phillips/Slotted/Square drive type, including a(n) (50) #8-32 x 1-1/4 Round Head Tri-Drive Screw - Zinc, (50) 8-32 in. x 1- 1/2 in. Round Head Tri-Drive Screw - Zinc and (75) #8-32 x 1/2 in. Round Head Tri-Drive Screw - Zinc, (75) 8-32 in. x 3/4 in. Round Head Tri-Drive Screw - Zinc and #2 Square Power Bit 1 in. Long and (75) #8-32 x 1IN Round Head Tri-Drive Screw - Zinc and (50) #8-32 x 2 in. Round Head Tri-Drive Screw - Zinc