Tungsten Carbide Burr Set 1 8" Shank，Die Grinder Bits with Sanding Drums and Grinding Stone Set, 194Pcs Pratical Sanding Bits Kit Compatible with Dremel Rotary Tool 194 Pcs Size:194 Pcs 000 Hz Features: Easy to read multi segment 26 Thread length 11mm 000 Hz Features: Easy to read multi segment LED display your purchase will be guaranteed to get money back if items received with any dissatisfaction The grinding stones are made of pink fused alumina which is a high quality industrial abrasive and tough enough to smooth out most materials 20Pcs Tungsten Carbide Burr Set: The set is placed in a plastic case with the double cut design can grinding materials fast and remove chips easily