Designed to cut quickly with minimal friction and heat build-up, Fisch Multi-Spur Bits feature two cutters and two scoring spurs to limit contact with the wood. The sharpened rim allows the bit to hold perfectly and the sides are slightly relieved so only the leading edge touches the outside of the hole. With this bit, you'll get smooth, precise flat bottom holes. This unique non-clogging design allows you to drill precise holes quickly without burning, while helping to increase the overall life of the bit.