Spiral Grooved Design: The spiral grooved design not only effectively removes debris but also reduces friction and heat during drilling, enhancing work efficiency. Step Drill Bit 3Pcs HSS Cobalt Set Nitrogen High Speed Steel Spiral For 1/4 Hex Shank Step Drill Made from high-quality high-speed steel, these drill bits ensure excellent durability and long-lasting performance. Whether for home DIY projects or professional machining tasks, it helps you tackle them effortlessly. The 118° split point tip drill reduces friction, pressure, and heat, making the drill bits long-lasting and efficient. Upgrade your toolbox with this high-performance 3PC Spiral Grooved High-Speed Steel Step Drill Bit Set! 3PC Spiral Grooved High-Speed Steel Step Drill Bit Set This 3-piece spiral grooved step drill bit set is the ideal choice for DIY enthusiasts and professionals, specifically designed for drilling holes in aluminum sheets, metal, and wood. This drill bit set is not only powerful but also easy to use. 31 Step Sizes: Each drill bit features multiple step sizes, with a total of 31 different sizes to meet various drilling needs, eliminating the need for frequent bit changes. 3PC Step Drill Bit Set, 1/4" Hex Shank High-Speed Steel Spiral Grooved Step Drill Bit for Sheet Aluminium Metal Wood Hole Drilling, 31 Step Sizes Taper Drill bit Set for DIY Lovers Wide Application: Our step drill bit can process different diameter holes, and can be used on materials such as metal heavy-duty, iron, aluminum, brass, plastic, aluminum alloy, wood, plastic, etc. Suitable for home DIY and general use Wide Application: Our step drill bit can process different diameter holes, and can be used on materials such as metal heavy-duty, iron, aluminum, brass, plastic, aluminum alloy, wood, plastic, etc. WORKPRO 3-Piece Step Drill Bit Set, 1/4 Hex Shank Quick Change Multi-Purpose: Suitable for drilling in aluminum sheets, metal, and wood, making it an ideal tool for home, factory, and workshop use. 31 Step Sizes: 13 step drill (1/8, 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16, 15/32, 1/2-inch) 6 step drill (3/16, 1/4, 5/16, 3/8, 7/16, 1/2-inch) and 12 step drill (3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8-inch)
