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 - STEP DRILL BIT-BLACK

• UPC   671891736400
• 【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 .