Woot offers CRAFTSMAN 5-Piece Grinding Stones, 1/4-Inch Shank, 25,000 RPM, for Angle and Die Grinders, Multi-Material for $5.99 (orig. $19.99) free shipping with Amazon Prime.

Product Description:
The CRAFTSMAN 5-pc Grinding Stone Set offers a versatile selection of1/4-in shank grinding stones for a wide range of applications, includingpolishing, deburring, grinding, sharpening, sanding, and smoothing.This comprehensive set includes wheel, cylinder, ball, cone, and treeshapes, providing the right tool for any job. Rated for speeds up to25,000 RPM, these stones ensure efficient material removal, making themideal for various surfaces like wood, metal, and more. Built withhigh-quality stone abrasives and solid steel shanks, these grindingstones are designed for long-lasting durability. The set also featuresthree grit types (fine, medium, and coarse), giving you the precisionand control needed for detailed work on diverse materials. Compatiblewith most 1/4-in angle and straight die grinders, this set is amust-have for both professional and DIY use.