GMTOOLS 29Pcs Cobalt Drill Bit Set – 135° HSS, Black/Gold Finish, 1/16"-1/2" with Indexed Case

Overview

The GMTOOLS 29-piece cobalt drill bit set brings a blend of strength and precision to metalworking, woodworking, and hard plastics. The bits are finished in a distinctive black and gold coating, combining a robust look with practical performance suited to a range of DIY and professional tasks.

Key benefits

• 135-degree split point for centered starts and quicker penetration with less pressure.
• High-speed steel with a cobalt composition and a black/gold oxide finish enhances corrosion resistance and wear performance.
• Self-centering round straight shank prevents walking, delivering cleaner starts and steadier drilling.
• Fully ground twist design reduces friction and supports efficient cutting across metals, wood, and hard plastics.
• Versatile material compatibility covers stainless steel, cast iron, alloys, wood, and hard plastics for common tasks.

What you get and how it’s organized

• A complete set of 29 bits ranging from 1/16" to 1/2" in a durable metal indexed case for quick size selection.
• Sizes included span the most-used increments to cover a broad spectrum of jobs, from light to moderately tough tasks.
• Each bit is designed for versatile drilling performance, with a focus on stable starts and reliable edge geometry.

Practical use scenarios include metal brackets, automotive light fabrication, furniture assembly, and hard plastic components. The kit’s finish and geometry are intended to deliver consistent results across tasks, while the storage case keeps the set organized between jobs. A 30-day money-back guarantee and satisfaction promise offer risk-free shopping, aligning with a practical approach to tool investments.

Care and considerations

To maintain performance, use appropriate drill speeds and apply steady pressure. While the set is built for corrosion resistance and wear, routine care extends the life of each bit and preserves cut quality over time.