3PCS Spiral Step Drill Bit Set High Speed Steel Hex Shank 4 Flute Bits for Metal Aluminum Wood Plastic 1 8 1 2 1 4 3 4

Feature: 1. 4 Flute Spiral Step Bit: The 4 flute spiral drill bit ensures maximum cutting stability, quicker chip removal, and extended drill bit lifespan. The upgraded design minimizes wobble and heat buildup, enabling cleaner holes and accuracy, even when drilling stainless steel and hardened metals 2. High Speed Steel: This drill bit set is crafted from high speed steel (HSS) material with nitride coating, offering high hardness, wear resisting, and long lasting durability. Each drill bit undergoes rigorous inspection and multiple manufacturing processes to ensure consistent performance 3. Specifications: This set includes 3 HSS step drill bits with diameters of 1 8 to 1 2 inch (13 steps), 1 4 to 3 4 inch (9 steps), and 3 16 to 7 8 inch (12 steps). Equipped with 1 4 or 3 8 inch hex shank, compatible with most standard electric drills and impact wrenches. The set is neatly organized in a tool box for easy carrying and quick access during work 4. Clear Markings: Each step drill bit features etched size markings that remain clearly visible even after prolonged use, eliminating the need for guesswork or measurement. The incisive cutting edges and balanced design ensure smoother and effortless drilling every time, saving effort and ensuring accuracy 5. Multi Scene Applicability: These step drill bits are suitable for drilling into stainless steel, copper, aluminum, wood, plastic, and carbon steel. Whether you are engaged in home renovation, automotive repair, or electrical installation, this set is practical for craft enthusiasts, professionals, and maintenance workers Specification: Item Type: Spiral Step Drill Bit Set Product Material: High Speed Steel (HSS) Shank Type: Straight (1 4 and 3 8 Inch Hex Shank Compatibility) Flute: Spiral, 4 Flutes Design Steps: 1 8 1 2 Inch (13 Steps) 1 4 3 4 Inch (9 Steps) 3 16 7 8 Inch (12 Steps) Storage Box Size: Approx. 14.1 x 10.3 x 4.8cm 5.6 x 4.1 x 1.9in. Package List: 3 x Step Drill Bits 1 x Storage Box