Irwin 4935108 IRWIN Multi-Material Jobber-Length Drill Bits, 1/4-Inch, 5/Pk (4935108)

Multi-Material Jobber Length Masonry Drill Bit - 1/4" x 4" - 5 Bits/Pack. Designed specifically for rotary drilling, but are tough enough to be used with hammer drills. Carbide tip has a unique diamond-ground, four-facet design with sharper cutting edges for centered starts with no walking, fast drilling, and excellent hole quality in a variety of materials. Double-milled flute ensures fast, efficient removal of drilling dust and debris to increase speed and prevent clogging. Compatible with all standard 1/2" and 3/8" chuck drills. Hole Size: 1/4". Flute Length: 3". Overall Length: 4".