SILATU Step Drill Bit - 1/4” to 1-3/8” Step Drill Bits for Metal, High Speed Steel Black Coated Stepping Bit, Unibit Ten-Flute Step Drill Bit Sizes for Wood, Metal, Plastic, Multiple Hole

Key features

• 【HSS And Black Coating】: Step drill bit made of industrial high-speed steel have excellent durability and high-speed punch. Black coating improves the step drill bit sharpness and reduces the heat generated by friction to easily cut metal sheets.
• 【Ten-Flute Sizes】: Step drill bits for metal compatible with 10 Sizes: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1- 1/4", 1-3/8". Meet your different needs, greatly save you the trouble of choosing different step drill bit.
• 【Innovative Design】: The 118° split-point tip design of the step drill bit increases the cutting speed while preventing off-center line when drilling. 3 Flat Shank design for increased safety and stability, the step drill bit can be better fixed to the pistol to prevent falling off and slipping during the rotation.
• 【Dual Groove Design】: Step drill bit grooves provide a smoother cut that removes burr chips, dust and chips for faster chip evacuation, while helping to prevent chips from flying, allowing for smoother drilling without heating.
• 【Compatibility】: Drill a small (about 1/8 inch) pilot hole before using the step drill bit, it can drill up to 0.2mm thickness of plastic, wood, fiberglass .