Milwaukee SDS-Max and Spline Thick Wall Carbide Tipped Core Bit 4 in.

The Milwaukee? SDS-MAX and SPLINE Thick Wall Carbide Tipped Core Bit 4-inch drills holes in concrete in less time than larger bits take to do the same work. This concrete core bit is hollow in the center， so it only has to cut through a small amount of material to remove a large section. It's effective drilling depth is 4-3/8 inches. The Milwaukee core bit's thick-wall design makes it far more durable than thinner models while still drilling with incredible speed. This bit is designed for use with SDS rotary hammers， which deliver their force to the bit instead of the shank， so you can get your job done effortlessly. Use the included guide plate and centering pin to make sure that your hole is centered for extra accuracy.