Easier Engraving: The engraving drill is suitable for carving deep slot, slot, curved lines, various patterns, etc., good crafting. Has 3 Flute Head: The curved 3 flute design has great sharpness, which also enables quick removal to largely improve your woodworking. 7 Pieces in Pack: Comes with 6mm universal shank, the carving tool has different head size of 3mm, 4mm, 5mm, 6mm, 8mm, 10mm and 12mm. High Speed Steel: Adopting premium high speed steel with great strength and durability with heat, as well as long term use. Wide Application: Allows for wide application on a variety of materials, including but not limited to wood, acrylic, soft metal, etc. Item Type:Engraving Drill Bit Handle Diameter:. 6mm/0.24in Head Diameter: . 3mm/0.12in, 4mm/0.16in, 5mm/0.2in, 6mm/0.24in, 8mm/0.31in, 10mm/0.39in, 12mm/0.47in Colour:Silver Material:Metal Package Contents: 7 * 6mm Shank Engraving Drill Bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.