RCINDUS 15PCS 1/4in Cobalt Drill Bits – HSS M35 for Steel, Stainless Steel, Cast Iron, Plastic & Wood

Overview

Meet RCINDUS 15 piece drill bit set designed for demanding materials. Each bit is crafted from cobalt-infused M35 high speed steel, delivering a balance of hardness and durability for a range of metals and tough plastics. The bits arrive in a clear plastic case that keeps the set neatly organized for quick access on the job site.

Why these bits stand out

Compared with standard HSS options, the cobalt content enhances edge retention and wear resistance, helping you work through harder materials with less frequent bit changes. The manufacturing process emphasizes precision, with multiple grinding and hardening steps that help maintain a tight diameter tolerance. The result is a reliable tool that can support consistent hole sizes across multiple entries.

Key design and performance features

• 135-degree split-point reduces wandering and starts holes cleanly on tough surfaces.
• 5% cobalt content (M35) contributes to improved hardness and heat resistance during drilling.
• Suitable for hardened metal, stainless steel, cast iron, as well as durable plastics and PVC boards.
• Diameter accuracy controlled within a tight tolerance to support repeatable results.

Practical uses and scenarios

• Metalworking: drilling into hardened steel, stainless steel, and cast iron for fixtures and brackets.
• Plastic and PVC projects: reliable starts in resistant plastics and composite boards.
• Woodworking: through-holes and pilot holes in various woods for fasteners or joinery.

Storage and care are straightforward thanks to the included plastic case, which helps you keep the bits organized and protected between jobs. While the bits are designed to perform well across materials, actual results depend on drilling speed, lubrication, and material condition. Use within the recommended chuck and feed rates to explore the full potential of this cobalt alloy set.