Specification:
Material: 45Carbon Steel
Shank: 3/8 inch(10mm) Round shank
Sizes: 1/4 inch(6mm),3/8 inch(10mm),1/2 inch13mm),5/8 inch(16mm)

Features:
The set includes two shapes, four sizes of drill bits to meet your different work needs in daily use
Made of high grade carbon steel, precision manufacturing, high strength, smooth surface and corrosion resistance
Can be used with hand and bench drills, but for best results, use a drill press for increased efficienc

Note:
Suitable for hand drills and bench drills, but for best results use a drill press for efficiency
For your safety, please do not use too fast, bench drill speed should not be too fast, easy to produce smoke and burns

Package Includes:
4 pcs Standard Plug Cutters
4 pcs Four Tooth Chamfered Cutters