Spec:
The drill bits are made of fine-quality high speed steel with nitrogen treating surface, high hardness and wear resistance, with long durability and strong drilling power. 1/4inch/6.35mm straight shank design allows this drill bits to be inserted directly into a drill jig or drill press for easy installation. 15pcs/set, include 5 sizes of drill bits(3/4/5mm), and 5pcs each sizes, to meet your different needs perfectly. Ideal for DIY wood working, home use and general building, engineering using.

Features:
Made of fine-quality high speed steel with nitrogen treating surface, high hardness and wear resistance, with long durability and strong drilling power.
1/4inch/6.35mm straight shank design allows this drill bits to be inserted directly into a drill jig or drill press for easy installation.
15pcs/set, include 5 sizes of drill bits(3/4/5mm), and 5pcs each sizes, to meet your different needs perfectly.
Spiral grooves design makes smoother chip removal and reduces friction and heat accumulation for higher efficiency, with high efficient drilling performance.

Specifications:
Name: Drill Bits Set
Material: high speed steel
Shank diameter: 1/4inch 6.35mm
Item size:
3.0mm: 82 * 3.0 * 3.0mm / 3.23 * 0.12 * 0.12in
4.0mm: 94 * 4.0 * 4.0mm / 3.70 * 0.16 * 0.16in
5.0mm: 104 * 5.0 * 5.0mm / 4.09 * 0.20 * 0.20in
Package size: 130 * 80 * 50mm / 5.12 * 3.15 * 1.97in
Package weight: 180g / 6.35ounce

Packing List:
15 * Drill Bits