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HSS Step drill bits spiral flute
![HSS Step drill bits spiral flute HSS Step drill bits spiral flute](https://image.seohost.cn/storage/6910/product/20190325/1553506378282260.jpg)
specification
HSS Step drill bits spiral flute
the drill bits can drill cylindrical holes in solid material up to a thickness of 4mm(5/32")
Ideal tool for sheet metal workers, electrical contractor auto mechanics and general contractors
Burr-free and vibration-free drilling