Four Spiral Flute Step Drill Bit Set 3/16 Inch To 1-3/8 Inch Range With 1/4 Inch Shank HSS Unibit For Aluminum Wood Plastic Metal Durable Industrial Grade Bit Kit For Fast Hole Cutting

Four-Flute Step Drill Bit Set, Pack of 4, 3/16-1-3/8 in
✔️ Four-flute design, 3/16-1-3/8 in range, 1/4 in shank, HSS Unibit

This four-flute step drill bit set is built for drilling fast, clean holes across metal, wood, aluminum, copper, iron, and plastic. It’s a handy addition to any workshop for DIY projects and fabrication tasks where precise hole sizing matters.

✅ Range of hole sizes from 3/16 in to 1-3/8 in, in four steps
✅ Shank size: 1/4 in for compatibility with standard drills
✅ Material: high-quality alloy steel for durability
✅ Laser-engraved step sizes for quick reads during drilling
✅ Stable four-flute design minimizes deflection and improves accuracy

💡 What is a step drill bit used for and why is the four-flute design handy?

- handy for clean, stepped holes in metal, wood, and plastic
- improves drilling stability and reduces deflection during cut
- compatible with standard 1/4 in shank drills for easy setup
- ideal for DIY projects and fabrication tasks where size matters