General description This 147 pcs Bit Set is designed for use with mini drills and rotary tools, making it an ideal choice for various DIY projects. It includes a diverse assortment of tools perfect for cutting, carving, sanding, grinding, cleaning, and polishing. Technical specifications Includes: 147 pieces Shank size: 3.2 mm Material: Metal and Plastic Measurement allowed error: +/- 1-3 cm Compatibility and accessories Compatible with most models of rotary drills Other information Package Contents: 1 * (147 pcs) Electric grinder set Note: Light and different displays may cause the color of the item in the picture to differ slightly from the actual product.