STROTON Cobalt Drill Bit Set (13Pcs, 1/16–1/4 In) | M35 HSS for Stainless Steel, Iron, Wood

Overview

Meet the STROTON Cobalt Drill Bit Set—a 13‑piece collection built to tackle demanding metals and precise woodworking. Each bit uses a true cobalt alloy with about 5% cobalt and targets a hard edge around 68 HRC, balancing rigidity with heat resilience for tough cutting tasks.

Key advantages at a glance

• 5% cobalt alloy drawn from our own mine for improved wear resistance
• 68 HRC hardness for a sharper bite through stainless steel, cast iron, and hard alloys
• Split point design helps start holes cleanly and reduces walking
• Fully ground edges for a true, durable cutting edge
• 13‑piece set spans 1/16 to 1/4 inch in 1/64 inch increments
• Jobber length offers reach and control in tight spaces

Real‑world applications

In everyday projects, these bits can help you drill through stainless steel plates, iron sheets, and hardwood with confidence. The assortment supports a range of hole sizes, enabling quick preparation of mounting holes, bolts, or fittings without swapping bits frequently.

Performance notes and usage tips

• Use steady feeding and compatible lubricants when metal drilling to manage heat and wear
• Clamp workpieces securely and withdraw periodically to clear chips
• Avoid overheating by taking partial holes and allowing cooling breaks
• Keep bits clean and stored in the included case to preserve edge integrity

What to expect

Users often report faster hole production and extended tool life under heavy use, thanks to the cobalt formulation and robust geometry. While results vary by material and technique, the design aims to offer reliable, repeatable performance across common metals and wood.