This spiral groove drill bit is made of high-class material to ensure durability and stability. It can easily cope with a wide range of tough materials, providing you with a reliable drilling solution. It is strictly designed to make your work more efficient. Come and buy it! Key Features Build to Last: It is made of premium steel, with a titanium coated process, which is wear-resistant, deform-resistant, rust-resistant, and does not fade, ensuring long-term use without frequent replacement. High Performance: With a split tip of 118°, it features a double helix blade and double notch design that not only makes the cut smoother but also prevents filler from flying around, making it easier to remove material particles. Time-saving& Effort-saving: The drill has 12 hole sizes( 0.24 in, 0.39 in, 0.59 in, 0.79 in, 0.98 in, 1.18 in, 1.38 in, 1.57 in, 1.77 in, 1.97 in, 2.16 in, 2.36 in), which can open a variety of specifications and dimensions of the aperture. A step drill is approximately equivalent to a box of drill bits, saving the time and effort of replacing drill bits and improving your drilling efficiency. Thoughtful Design: Compared with an ordinary twist drill, it is not easy to break, and has small shaking, and can drill a beautiful aperture without needing to use the center punch. Moreover, it can also complete the functions that the twist drill cannot complete, such as deburring, chamfering, opening round holes, reaming holes, and so on. Easy to Store: The compact size and lightweight(1.32 lbs) allow you to take it or store it easily without taking up too much space. Easy to Clean: Thanks to its simple construction and smooth surface, you can wipe the stains off its surface with a piece of damp rag. Assembly-free: When you receive the product, you can directly install it into the drilling machine(not included) for use, which is very convenient! Customer Service: We aim to provide quality products and services. If you have problems, please feel free to contact us. We will reply and solve the problem for you as soon as possible. Specification     Color: Silver Shape: Pagoda Shank Type: Triangular Style: Modern Material: Steel Process: Titanium Coated Holes Quantity: 12 Hole Sizes: 6mm/0.24 in, 10mm/0.39 in, 15mm/ 0.59 in, 20mm/ 0.79 in, 25mm/ 0.98 in, 30mm/1.18 in, 35mm/ 1.38 in, 40mm/1.57 in, 45mm/ 1.77 in, 50mm/1.97 in, 55mm/2.16 in, 60mm/2.36 in Spiral Flute Size(D*H): 59.8*83.5mm/2.35*3.29 in Shank Size(D*H): 11.5*25.5mm/0.45*1 in Product Overall Height: 10.8cm/4.25 in Package Size: 13*10*9cm/5.12*3.94*3.54in Gross Weight: 0.81kg/ 1.78lbs Net Weight: 0.6kg/1.32 lbs Package Included 1* Spiral Groove Drill Bit Notes 1.Please note that this product does not include a coring machine. 2.Please note that this product cannot be used on metal plates.