Fisch Forstner Wave Cutter drill bits feature a wavy edge that guides the drill bit with all the precision of a traditional Forstner, but with less friction and heat build-up. Sharp sharp teeth slice through the grain for minimal chips, while breaking waste for better chip clearance. The result is a bit that cuts faster and lasts up to three times longer than a standard Forstner drill bit. Use them to drill angled holes, overlapping holes and flat bottom holes that are precisely true to size. They also excellent for drilling into the final grain without deviating. Features: The wavy edge cuts like a knife to guide the tip and keep it on track. The serrations help to break waste for better chip clearance. Low friction and less heat for longer life. Sharpen up to 30 times for excellent longevity. All bits are 90mm long