ITEM NAME:15Pcs/Set 3-10Mm Diam Twist Drill Bit Woodworking Drill Three-Pointed Drill X1S1 15Pcs/Set 3-10Mm Diam Twist Drill Bit Woodworking Drill Three-Pointed Drill X1S1 PREMIUM MATERIAL:High Carbon Steel for Shank to ensure the high hardness, and wear-resistance, abrasion-resistance, high red hardness. Best Welding and Soldering to enable drill life longer and smooth without tip-out. Efficient Helix Flute Design to keep the quickest removal of chips and debris through flute during penetration of workpiece.Polished well done finishing and premium heat-treatment to enable the high hardness of surface and wear-resistance to keep long tooling life.Applicable for variety of material drilling, such as Hardwood, Softwood, Polywood, woodboard, Plastic, Cabinet, Cupboard, Furniture and other woodworking jobs Material:Carbon Steel Color:Black+Silver Quantity:15pcs Size:3-10mm Use:Woodworking Package Contents: 15* Twist Drill Bit.PREMIUM MATERIAL:High Carbon Steel for Shank to ensure the high hardness, and wear-resistance, abrasion-resistance, high red hardness. Best Welding and Soldering to enable drill life longer and smooth without tip-out.