Product Advantages:
The spiral step drill bit set allows for accurate drills, and the double-blade design is easy for drilling. The metric step drill bits can quickly drill on wood, plastic and soft metals such as copper and aluminum.
A set contains 3pcs metal drilling step bits, which is very suitable for metalworking, woodwork, DIY enthusiasts, and craftsmen to buy and use.

Product Specifications:
Material: High-Speed Steel
3 Different Metric Sizes: 4mm-12mm / 4mm-20mm / 4mm-32mm
Shank Diameter: 1/4 Inch / 6.35mm (Hex Shank)

Package Contains:
3 x Steel Spiral Step Drill Bit
Tips: There may be a 1-2mm error in manual measurement, please don't mind.

After-Sales Guarantee:
Aracombie has a 24-hour human customer service. If you have any questions before purchasing or are not 100% satisfied with the product, please feel free to contact us, and we will provide you with solutions as soon as possible.