4-edge straight groove step bit 2-edge R-shaped bit
2-edge stepped drill 2-edge tungsten steel spiral stepped drill
4-edge high-speed steel chamfer cutter 4-edge chamfer drill
2-edge straight groove pitting drill for high-speed steel pitting drill
Welding Edge Flat Drill Stepped Flat Drill
High Speed Steel Ditch Drill
HSS2 Stepped Spiral Bit High Speed Steel Stepped Bit
2-edge spiral stepped drill for high-speed steel stepped drill
Percussive drilling cement drill
High-speed steel 4-edge chamfer drill