ITEM NAME:20pcs Burr Bit Grinder HSS For Routing Wood Rotary Milling File Cutter Product Description Description: Item specifics Size: 20pcs 3mm shank DIY Supplies: Woodworking Model Number: 20pcs Burr Bit Grinder Type: Other Type 1: Free.Type 8: Rotary Burr Rotary Rasp. Model Number: 20pcs Burr Bit Grinder. Type 7: 20pcs Burr Bit Grinder. Type 6: Grinding Rotary Burr File. Type 3: Woodworking End Milling Cutter. Type 5: HSS Rotary Files Set.