ZS - 99 Piece Steel Twist Drill Bit Set

99 Piece Steel Twist Drill Bit SetHSS Titanium Coating: Classic HSS structure, titanium coating, with durability.The cutting edge is hardened and polished to ensure sharpness and vibration-freedesign.Includes: 1.5mm x 16 pcs, 2.0mm x 16 pcs, 2.5mm x 15 pcs, 3.0mm x 10 pcs, 3.2mmx 10 pcs, 3.5mm x 8 ps, 4.0mm x 8 pcs, 4.5mm x 3 pcs. 5.0mm x 3 pcs, 5.5mm x 2pcs, 6.0mm x 2 pcs, 6.5mm x 2 pcs, 8.0mm x 2 pcs, 10.0mm x 2 pcs