Hymnorq 10 Pack 4mm Twist Drill Bits, 135 Degree Anti-Slip Top Angle Design, M35 High Speed Steel with 5% Cobalt , Complete Grinding Process, Super Abrasion and High Temperature Resistance, Wait for Wood, Plastic, Aluminum, Copper, Cast Iron, Stainless Steel Metal to Drill Holes

Hymnorq 10-Piece M35 Cobalt Steel Drill Bit Set for Metals – 4mm Diameter, Dual Twist Flute, 135° Split Point, Bronze Hue Finish, Straight Shank, Chamfered End, PP Plastic Case

M35 5% Cobalt Metric Drill Bits Set (1mm-10mm/19pcs), Straight Shank Jobber Drill Bits, Metal HSS Twist Drill Bits for Stainless Steel Hard Metal and Cast Iron

Metric Cobalt Drill Bits 4mm 10PCS, M35 high Speed Steel, high Hardness Straight Shank Drill, Mechanical or Hand Drill for Drilling, Suitable for Stainless Steel, Iron, Copper and Aluminum.