Irwin Masonry Drill Bits, 3/16 inch X 4 inch, Nickel plated for fast, smooth performance, Carbide tip can be used for rotary and hammer drilling applications also for deep drilling, Slow spiral for quick and easy debris removal 7/16 inch and larger drill bits have reduced shanks.
UPC: 024721029058
Manufacturer Part No:
More aggressive 26.0 mm flute pitch
Changed back angle from 10º to 24º
Diamond ground tip with more aggressive cutting angles for increase drilling speed
Fits all drills with a 1/4 or larger chuck
3/16 x 4
Tested other carbide grades, current grade performed the best