Set of 3 high-speed steel spiral step drill bits, hexagonal shank, 4 flutes, for metal, aluminum, wood and plastic, 1/8-1/2, 1/4-3/4, 3/16-7/8 inch

Features:1.4-Flute Twist Drill Bit: The 4-flute twist drill bit ensures maximum cutting stability, faster chip removal, and extended drill bit life.The improved design minimizes wobble and heat buildup, resulting in cleaner, more accurate holes, even when drilling stainless steel and hardened metals.2.High-Speed ​​Steel: This drill bit set is made from high-speed steel (HSS) with a nitride coating, providing high hardness, wear resistance, 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 a 1/4" or 3/8" hex shank, compatible with most standard electric drills and impact wrenches.The set is neatly organized in a toolbox for easy transport and quick access while working.
4.Clear markings: Each step drill bit features engraved size markings that remain clearly visible even after extended use, eliminating the need for guesswork or measuring.Sharp cutting edges and a balanced design ensure smoother, effortless drilling every time, saving effort and guaranteeing accuracy.
5.Multi-scene applicability: These step drill bits are suitable for drilling in stainless steel, copper, aluminum, wood, plastic, and carbon steel.Whether you're involved in home renovation, auto repair, or electrical installation, this set is handy for DIY enthusiasts, professionals, and maintenance workers.
Specifications:Item Type: Spiral Step Drill Bit Set
Product Material: High-Speed ​​Steel (HSS)
Shank Type: Straight (Compatible with 1/4" and 3/8" Hex Shank)
Flute: Spiral, 4-Flute Design
Steps:
1/8-1/2" (13 Steps)
1/4-3/4" (9 Steps)
3/16-7/8" (12 Steps)
Storage Box Size: Approx. 14.1 x 10.3 x 4.8 cm / 5.6 x 4.1 x 1.9 inches

How to use:Install and use directly
Package list:Package includes 3 step drill bits
1 x storage box