The Great Wall Straight Shank Cobalt Twist Drill Set Stainless Steel High-Speed Steel Twist Drill Bits 19 Pieces 672219

Double rear angle head design (135°) for faster and more precise drilling

Deep U-shaped spiral chip groove for efficient chip removal

Laser-engraved straight shank for strong compatibility with standard chucks

Surface treated with yellow baking process for wear resistance, corrosion resistance, and rust prevention

Fully ground manufacturing process ensuring high precision and durability

Excellent cutting performance with sharp cutting edges

Long service life and high wear resistance

Fast drilling speed with smooth, non-stick cutting edges

Suitable for drilling various materials including aluminum alloy, mold steel, copper plate, steel plate, and cast iron

Available in multiple sets including 6-piece, 10-piece, 13-piece, and 19-piece drill bit sets