Tungsten Carbide Rotary Burr Set 3mm-1-8- Shank for DIY Woodworking Carving Engraving Drilling 20Pcs Rotary Bits

Sets of electric grinder HSS woodworking small rotary bit, engraving DIY grinding head milling cutter. Material: high speed steel Product Instructions: This product is mainly used for engraving and milling of soft wood. Product size: The handle has a diameter of 3mm(1/8”) and total length of 40mm(1.57”). Caution: When you use this drill bits, the material temperature will get very high, please add some water or coolant to avoid the material get smoke when using it.