This 12mm FISCH Wave Cutter is a high performance next generation Forstner Bit and is truly the world's best! Designed with the patented "Wave Cutter", this Forstner bit has been tested against other leading bits and has been  proven to drill 3 times the number of holes before needing to be re-sharpened! Manufactured from Forged and Heat Treated Steel, its unique non-clogging design allows you to drill precise holes quickly without burning, while helping to increase the overall life of the bit. Drills smooth and precise holes in soft woods, hard woods and laminates with 25-Percent less power required. The shank is 6mm and the overall length is 90mm.  Designed for the professional trade and can be used in portable power drills and stationary boring machines.    Shipping on this item is free via USPS or UPS. I do combine shipping wherever possible.