Three-point positioning: Three-point centering is better, not easy to slip, no skew, accurate and fast drilling. High carbon steel material High-speed steel is quenching, high hardness, good wear resistance, high heat resistance and high strength, durable. Wood twist bits can be used for thin metals such as steel and aluminum, especially plastics or wood. Round handle design: The twist wood bits are 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm. Suitable for table drill, hammer drill, use more convenient. Removable and adjustable: Adjustable sleeve depth of cutters wood with a key.Woodworking forage and chamfering removable parts. the large chip flutes and five-edge beveling machine for fast removal of sawdust to achieve a smooth surface on any type of hardwood, cork or aluminum. Specification: Material: * Three point woodworking drill bit Drill bit: 4241 high speed steel * Woodworking Chamfer: #45 high speed steel Surface treatment: Natural color Handle Features: Round Handle Dimension: 3mm (Dia) x 60mm (L) 4mm (Dia) x 75mm (L) 5mm (Dia) x 85mm (L) 6mm (Dia) x 93mm (L) 7mm (Dia) x 10mm (L) 8mm (Dia) x 11mm ( L) 10mm (Dia) x 12mm (L) Package Included: 7 x Carpentry Chamfer < p>1 x L-wrench Sold by Briday Store