DescriptionThis product is a twisting drill bit set, which is mainly made of steel material, strong and durable, good texture, reasonable design and practical functions. Produced by precision ground which ensures chips move smoothly, which can effectively help you improve your work efficiency and save your time.Features-Color: As Shown. -Material: Steel. -Size: About 13.00X0.90X0.90cm/5.11X0.35X0.35in -Note: Specification type: 1.5mm; 2mm; 2.5mm; 3mm; 3.5mm; 4mm; 4.5mm; 5mm; 5.5mm; 6mm; 6.5mm; 7mm; 8mm; 9mm; 10mm. - Suitable for hardened material. Particularly successful in cutting through hard metals. - With unique twisted design, drilling is more convenient and easy, save time and effort. - Suitable for tough, high tensile strength material, such as cast iron, stainless steel, etc. - Round straight design, self-centering prevent walking, make drilling precise and faster.- Multiple sizes are suitable for different scenarios. Suitable for electric drill bench drills.