RCINDUS 15-Piece 7/32-Inch Cobalt Drill Bit Set – M35 HSS for Steel, Stainless Steel, Cast Iron, Wood & Plastic

Overview

The RCINDUS 15-piece cobalt drill bit set blends hardness, precision, and practical design for your toolkit. Each bit is sized at 7/32 inch (5.556 mm) in diameter and ships in a sturdy plastic storage case for quick access on site or at the bench.

What’s included and key specs

• 15-piece pack with a durable storage case for organized workspaces
• 7/32 inch (5.556 mm) diameter bits for a wide range of tasks
• M35 cobalt-alloy HSS with 5% cobalt for improved wear resistance
• 135-degree split-point for automatic centering and reduced walking on the work surface
• Diameter accuracy within 0.03 mm to support consistent hole size

Materials and construction

Made from M35 high-speed steel with cobalt, these bits offer enhanced hardness and edge retention compared with standard HSS. The manufacturing process involves more than a dozen steps, including grinding and hardening, to deliver consistent performance and quality across the set.

Applications and use cases

Designed for a broad range of materials, the set handles hardened metal, stainless steel, cast iron, as well as plastic, PVC board, and wood. Whether you’re drilling a steel bracket, a plastic component, or a wooden jig, these bits are suitable for both beginners and experienced users seeking dependable results.

Care and performance tips

• Store in the included case to protect cutting edges and keep your bits organized
• Use appropriate lubrication or cutting fluid to manage heat and extend bit life
• Avoid excessive feed pressure to minimize wandering and wear

Results can vary with material and setup, but the combination of cobalt alloy, precise diameter, and a center point supports cleaner starts and enhanced life in demanding drilling tasks.