amoolo 1/4 inch Cobalt Drill Bit Set – 10 Pcs M35 HSS for Hard Metals, Stainless Steel & Cast Iron

Premium amoolo 1/4 inch Cobalt Drill Bit Set

Meet the amoolo 1/4 inch cobalt drill bit set, a compact 10-piece kit built for metalworking and multi material tasks. Crafted from M35 cobalt high speed steel, these bits resist wear while keeping sharp edges through demanding jobs. With a 1/4 inch diameter and a flute length of 69.85 mm (2-3/4 inches), the bits strike a balance between reach and rigidity, making them suitable for a wide range of projects in home workshops and professional shops.

Precision you can feel

Every bit starts with a fully ground spiral groove that promotes fast chip evacuation and cooler drilling. The 135° split point helps prevent walking and reduces wandering, so you can begin cutting with confidence. No center punch is needed in many materials, which saves setup time and keeps your workflow smooth.

Versatility across materials

Designed to tackle hard metals and more, these bits excel on stainless steel, steel, sheet metal, and cast iron. They also perform well in softer materials such as plastic, aluminum alloy, and wood, making the set a flexible choice for mixed-material projects. For best results, monitor speed, apply steady pressure, and manage heat during use.

Durability you can rely on

The set uses 5 cobalt in the alloy, boosting wear resistance and helping maintain a sharp tip across repeated drilling sessions. A robust construction paired with thoughtful geometry supports longer bit life in tough environments. The kit arrives in a sturdy box, designed for easy storage and quick access in busy workshops.

What you get and how it fits

This 10-piece set fits the majority of power drills currently on the market, offering a practical solution for professionals and DIYers alike. The combination of a proven cobalt alloy, precision geometry, and organized packaging makes it a convenient addition to your tool lineup.

• 10 pieces of 1/4 inch cobalt drill bits for metal and multi-material tasks
• Fully ground tips and 135° split point for precise starts and reduced walking
• Boxed packaging for organized storage and quick access

• M35 cobalt high speed steel delivers enhanced wear resistance
• Flute length 69.85 mm for adequate reach in a range of setups
• Compatible with most drills and suitable for stainless steel, cast iron, plastic, and wood

Note: Observe appropriate speed, pressure, and heat control to optimize performance and extend tool life. The 90-day warranty provides reassurance should you need support after purchase.