Product description

COBALT HSS STEP DRILL BIT SET

MEET THE NEEDS OF COMMON SIZES

• Can this short-body unibit actually drill clean holes inside extremely tight electrical boxes?

  YES. The ultra-short EDC body is engineered for restricted, tight spaces.Pair this compact unibit with a right-angle drill adapter to access impossible, narrow joists and boxes.

• why is a spiral flute step bit better than a straight flute one for DIY projects?

  Spiral flutes clear metal chips upwards automatically, preventing clog-induced overheating and ensuring smoother, faster cutting in aluminum and wood.

• Can this M35 cobalt step drill bit easily cut through 304 stainless steel without burning out?

  YES. Crafted from premium M35 Cobalt HSS (HRC 65-67), it withstands temperatures up to 1100°F. Always use cutting oil at low RPM (under 400) on hard metals for infinite lifetime.

• When drilling larger holes, how does a 1/4-inch shank withstand high torque without breaking?

  With a heavy-duty, heat-treated hex shank structure that absorbs impact. Secure fully in chuck, avoid high-impact hammering, and let the spiral flute discharge chips.

• Can these step bits drill clean holes in delicate materials like acrylic, fiberglass, without cracking them?

  Yes. The spiral flute design shears materials smoothly rather than scraping, preventing splintering or cracking in plastics, acrylics, and fiberglass. Always use steady, light pressure.

• ENHANCED DURABILITY: Our industrial-grade step drill set is meticulously crafted from high hardnessy M35 cobalt HSS and undergoes multiple manufacturing processes. Each drill bit is carefully inspected at the factory to ensure superior quality and longevity.
• ULTRA-COMPACT FOR TIGHT SPACES :Engineered with an ultra-short body and optimized step height, this compact step bit easily accesses tight spaces where bulky standard bits fail. No more rubbing against obstacles—get clean, round holes in any restricted area.
• 5PCS NITRIDING STEP BIT KIT: Our 5-piece nitriding step bits set includes a range of sizes to cater to various drilling needs. The set comprises step bits with diameters of Single size 3/4", 5/8", 1/2", 3/8", 1/4". All these bits come in a sturdy blow molded case for easy storage and transport.
• VERSATILE DRILLING CAPABILITY: With its powerful drilling capability, our step drill is suitable for piercing holes in various materials, including thin metal, copper, aluminum, iron, carbon steel, wood, and plastic. It's an essential addition to any DIY enthusiast's toolbox and can be utilized for a wide range of household projects.
• USER-FRIENDLY DESIGN: Our step drill bits feature laser-engraved step sizes, ensuring clear visibility and eliminating concerns about wear and tear during use. This design element enhances convenience and accuracy, making the drilling process easier and more efficient.
• DEDICATED CUSTOMER SERVICE: While our products undergo stringent quality inspections, unforeseen issues caused by accidental factors may occur. In such cases, we are committed to providing professional customer service. If you encounter any quality problems, please contact us via Amazon, and we will promptly replace the defective item with a new one.