The Sorby 803H Mushroom Tool uses a standard Sorby shaft and handle to hold a cutter particularly suitable for undercutting the cap of mushroom shaped projects, but may be adapted for undercutting other items. Mushroom Tool Set (#88905) includes Shaft and Handle and a Mushroom Cutter (#88923). Handle and shaft will also accept a variety of other cutters, including a Mini Round Nose (#88915), Rim (#88917), Side / Face (#88919), and Side / End Box (#88921), giving you multiple possibilities once you have it. Tool has a blade length of 4-1/4" and an overall length of approximately 15-1/4". England.