Feature(may vary by option.)

●Material: The step drill is made of super high hardness high-speed steel (HSS steel 4241), and the surface is coated with titanium coating, making it harder and sharper than ordinary steel step drills
●[Design Benefits] The spiral design reduces pressure during cutting, and allows for better discharge of dust compared to conventional step drills for smoother cutting. Stair grooves prevent chuck from slipping
●Easy to use: The step drill is expanded in order from small holes to large holes, so you can modify the opening of multiple sizes and magnification of holes. The shape of the shaft is hexagonal shaft, so it can be used with impact drivers
●【Set Contents】4-12mm (4/6/8/10/12) 4-20mm (4/6/8/10/12/14/16/18/20) 3-12mm (3/4/5/6/7/8/9/10/11/12) Hexagonal Shaft Diameter: 0.25 inches (6.35 mm) (3 pieces common)
●Wide range of uses: This is an essential tool for drilling thin iron plates (small .4 mm), aluminum plates, wood, vinyl, resin, etc., for household DIY, enlarging the lower hole, chamfering, deburring, etc. Also suitable for cutting hardened materials such as hardened steel plates and stainless steel. A must-have item for home & work

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Description