Wood Carving Drill Bit Set: All shank size is 3mm/1/8inch. 5 drill diameter sizes of 3mm, 4mm, 5mm, 6mm, and 8mm, different size can satisfy your using needs. Material: Engraving drill tool is made of strong high-speed steel, durable and sharp. The three-sided arc groove can quickly and automatically discharge the chips from the side holes. that you can trim the wood easily and quickly while leaving a smoother surface. Positioning Tool: As the most commonly used marking tool in woodcarving, high-speed steel is also used. It is very suitable for polishing, embossing, and marking grooves. It is commonly used in wood carving, root carving, coffee table and furniture texture carving. Shank diameter: 3mm, blade diameter: 2.35mm, 3mm, length: 47mm. 3-Jaw Chuck: Quick change keyless chucks holds accessories with 1/32inch to 1/8inch shank sizes compatible for all cordless and corded rotary tools. One-piece structure design, alloy material, sturdy and durable, more than plastic models. The 3-jaw chuck is well-made, and the built-in spring is stable and durable. This keyless chuck provides a big improvement in precision, under high-speed rotation, it not only maintains stability but also improves work efficiency. color:Silver Material:steel Package Contents: 5 x HSS Wood Carving Bits 1 x Positioning Tool 1 x Quick Change Keyless Collet 1 x Transparent Box Only the above package content, other products are not included. Note: Light 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.