! ! One package: 6 pieces [Combination of sizes] The 6 most commonly used sizes can meet all your needs. The drill set is suitable for most electric drills currently on the market and is equipped with a portable plastic bag for easy storage and organization. 【M35 Cobalt High-Speed ​​Steel】 The industrial-grade 6542 high-speed steel drill set is harder than the 4241 HSS used in other similar drill sets. These drill bits also contain 5% cobalt, which improves wear resistance and durability. [Full grinding process and 135-degree split point] The fully ground spiral groove design quickly reduces friction and heat, resulting in faster and cooler drilling performance. The straight shank has a 135-degree split point to prevent walking and make drilling more accurate and faster. No center punch is required. 【Multiple Application】 It is suitable for cutting hard metals, such as stainless steel, steel, and cast iron, as well as wood, aluminum alloy, and other softer metals, including tiles, concrete, ceramic tiles, bricks, wood, plastics, glass, masonry, etc. 【Efficient work】 The product has sharp edges and high drilling efficiency. The product center has sharp serrations, with its help, the drill can continue to drill horizontally after drilling. scenes to be used Suitable for drilling and cutting wood, soft metals, aluminum plates, iron, etc. specification 3-8 mm titanium coated Hss drill bit set 3mm × 1 4mm × 1 5mm × 1 6mm × 1 6.5mm × 1 8mm×1 made in China Model: 6PCS High-Speed ​​Steel Serrated Drill Type: Drill Material: High-speed steel 4241 Weight: 75g Full length: 60-94 (mm) Shank diameter: 3-8 (mm) Blade diameter: 3-8 (mm) Product alias: saw drill