Features Fast Working: Spiral flute design enables efficient chip removal, streamlining the drilling process for quicker results. Accurate Cutting: The 118-degree angle and sharp blade deliver cutting, meeting diverse accuracy requirements. Premium Material: Crafted from high speed steel (HSS), ensuring durability, stability, and reliable performance. Versatile Application: Suitable for use on various materials including iron, aluminum, copper, and stainless steel, offering wide utility for Features: 1、Blade opening double rear corners can open holes quickly, which increases drilling speed and works efficiency. 2、Hardness strengthening treatment is of sharpness and wear-resistant, which is labor-saving, and has longer life. 3、Adopting deep U-shaped spiral groove design, this dril lset can increase the amount of waste discharged when working at high speed. 4、This drill set is widely used in iron, aluminum alloy, copper, plastic, wood, wall, stainless steel, cast iron. 5、Made of HSS high-speed steel, this twist drill set is very strong and after long time use. Specification: Item Type: Twist Drill Set Product Material: HSS high speed steel Specification: 1/1.5/2/2.5/ 3/3.5/4/4.5/5/5.5/6/6.5/7/7.5/8/8.5/9/9.5/10 MM Product Use: Iron/aluminum alloy/copper/plastic/wood/wall/stainless steel/cast iron Applicable Models: Electric drill, bench drill, rechargeable drill Package List: 19 x Twist Drill 1 x Storage Box Note: betweendiv>1 Note for charging drills: 12V charging drills are not recommended for insufficient torsion, 36V and 48V charging drills are recommended.between/div>betweendiv>2. Note for hand electric drill: the larger the hole diameter, the lower the electric drill speed. The recommended speed is within 1000RPM.between/div> Package List 19 x Twist Drill 1 x Storage Box