This two-prong spur drive is a favorite of Chris Ramsey and he turns some pretty big stuff. Two prongs lined up with the grain allows it to take a big bite and it won't slip. No more boring holes into your work piece with spur drives that won't hold. We guarantee you will love this product or your money back. These are made for us right here in Gainesville, to our specifications, and we have them hardened too. They are 1.5 inches in diameter and have a #2 taper.