DRILL MULTIPLE SIZED HOLES WITH ONE BIT...NO PILOT HOLES NEEDED!
This is an IRWIN Unibit Step Drill Bit High Speed Steel Fractional Hole Enlarging Bit
The Unibit® step drill bit features as single radial concave flute design for smooth, even cutting and virtually round holes. Ideal for drilling holes in steel, copper, brass, aluminum and other thin materials.
* Drills 6 holes: 3/16" to 1/2" in 1/16" steps
* 3 Flatted 1/4" shank, prevents slipping in drill chuck
* Non-Skid Self-Starting Tip
* Hardened industrial-grade high-speed steel for long life
