Our carbide grout removal bits are tools designed to clean out grout lines so you can replace damaged tiles or update your grout. 1/8-Inch Shafts Fit Dremel RotoZip and Similar Rotary Tools Comes with 1 piece each of three Diameters: 1/16", 3/32" and 1/8" (Three Bits Total) Premium Solid Carbide Construction for Excellent Wear-Resistance Comes in a professional plastic storage box to keep your tools secure and organized. Proudly Made in USA See images for more details. **Compatable with Dremel 566 and 565 Tool Guide but NOT compatable with Dremel 568-01 grout removal depth setting attachment.