- After quenching and honing, the cutting edge is sharp and non-chattering design. The staggered cutting teeth ensure accurate countersink and hole smoothness and cleanliness.
- Industry grade HSS Material drill bit set: industry grade High Quality High Speed Steel, High hardness, good wear resistance and durability.
- Super performance: Perfect Suitable for drilling holes in alloy steel, wood, nonferrous metal, cast iron and hard plastics.
- Full ground process and Titanium Surface Coating: Tin coating to enlarge the life of drill bits and longtime antirust.
- [MULTIPLE APPLICATION]Small Drill bits for soft metal, wood, plastic, steel within 5mm thickness, aluminum alloy and other soft metals. perfect for DIY projects, household maintenance and repair.xNOT for glass, ceramic or concrete drilling.