Machine Screw Kit, 124 piece(s), Round head, Phillips/Slotted/Square drive type, including a(n) (12) 1/4-20 in. x 1- 1/2 in. Round Head Tri-Drive Screw - Zinc, (12) 1/4-20 in. x 2 in. Round Head Tri-Drive Screw - Zinc and (35) 1/4-20 in. x 1/2 in. Round Head Tri-Drive Screw - Zinc, (30) 1/4-20 in. x 3/4 in. Round Head Tri-Drive Screw - Zinc and #3 Square Power Bit 2 in. Long and (20) 1/4-20 in. x 1 in. Round Head Tri-Drive Screw - Zinc, (15) 1/4-20 in. x 1 1/4 in. Round Head Tri-Drive Screw - Zinc