[Features]: Step drills can drill multiple sizes in stages. The shaft shape is a hexagonal shaft, so it can be used with impact drivers.
[Size]: Step drill (Large) 4-32mm / 15 steps (Medium) 4-20mm / 9 steps (Small) 4-12mm / 5 steps 3 pcs.
[Applications]: Aluminum plate, FRP, plastic, wood drilling, hole expansion, chamfering, etc.
[Material]: TSS coated HSS steel (high-speed steel) step drill is durable and sharp.
[Advantages]: Industry-grade fully ground high-speed steel with titanium coating reduces friction and drills with less heat, which ensures strong wear-resistance and durability.