This Replacement cutter is specifically for WoodRiver Square Carbide Replaceable Tip Turning Tool (Tool Sold Separately).The replaceable carbide insert on each tool is easily rotated to expose a sharp cutting edge by loosening the T15 Torx head screw with the included key and rotating the cutter. Once the insert is dull, replace it. No more hassle or wasted time sharpening.About Us: Founded in Boston in 1928, Woodcraft's operations were moved to Parkersburg, West Virginia in 1989. It's been over 90 years since Woodcraft first began selling high quality woodworking tools and supplies out of a one room shop in Boston's North End, and Woodcraft is still firmly committed to providing woodworkers with superior products and expert advice. We are America’s leading supplier of saws, hand planes, power tools, hand tools, wood stain and finishes, routers, sanding supplies, wood, wood turning project kits, dust collection, and wood carving tools. We also offer a wide selection of woodworking plans, books and videos. Our family of brands includes WoodRiver, Highpoint, Woodcraft, Pinnacle and Woodcraft Magazine.