Made of steel, durable and practical, with good craftsmanship details, and can be used for a long time. Round straight handle. Prevent walking, clear chips and particles faster. It is suitable for hard metal, stainless steel, cast iron, etc. It can easily improve your work efficiency and provide you with a more relaxed way of drilling. 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. - Can be used on stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics, etc. - Fine workmanship and excellent texture, which can provide fast and accurate drilling to improve efficiency. - Twisted design helps clear particles faster, decreases friction and heat for a cooler drilling performance. - Good heat resistance performance and outlast, particularly if your work involves drilling . - Easy to store, simple to use, convenient for you to replace, can be used for drilling steel and other hardened material. Package list: 15 x drill bits