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1. Unique 3-sided shank: Compared to traditional drills, spiral step drills are almost impossible to clamp. The unique 3-sided shank prevents it from slipping into the drill chuck and reduces impact, and it is recommended to lubricate the drill before each use to extend its lifespan. 2. Design optimization: The spiral step drill slot design and the three-sided design are optimized for high-speed cordless drill rigs, providing higher speed and control, while minimizing the flight of steel plates, which extends the lifespan. 3. 10 sizes of drill bits: The spiral step drill bit has 10 sizes, so you can drill 10 holes of different diameters, saving you time and effort in changing the drill bit. 4. Drilling depth: The drilling depth can be as high as 0.07 inches (about 0.2 cm) for steel plate, acrylic, PVC, and wood boards within 0.2 inches (about 0.5 cm). 5. Robust high-speed steel construction: The spiral step drill bit with strong high-speed steel structure is used to improve durability. The new spiral slot design cuts faster and straighter and can automatically deburr when drilling.

Item Type: Spiral Step Drill Bit
Material: High Speed Steel
Purpose: Spiral Step Drill
Color: Dark Yellow
Tool Handle Size: 3/8in
Drilling Range: 1/4in-1-3/8in
Step Size: 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch, 7/8 inch, 1 inch, 1-1/8 inch, 1-1/4 inch, 1-3/8 inch
Scope of Application: Use with Pistol Drill or Electric Drill

1 x Spiral Step Drill Bit

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