MACXCOIP Cobalt Left-Hand Drill Bit Set, 13Pcs M35 HSS, Case, 1/16"–1/4"

Meet the MACXCOIP Cobalt Left-Hand Drill Bit Set, a 13-piece kit designed for versatility across metals and non-metals. The left-hand design expands what you can accomplish, including scenarios where a screw extractor may be needed for stubborn fasteners. Crafted with durable M35 cobalt teeth and a high-speed steel body, these bits balance sharpness with resilience to help maintain accuracy through repeated drilling. The result is a tool range that feels reliable in both hobbyist workshops and professional settings, capable of delivering tidy holes in stainless steel, cast iron, copper, aluminum, and even plastics and wood.

Why this set stands out

• Left-hand design broadens workflow options and pairs with extractors when needed
• M35 cobalt composition delivers a tough edge and lasting performance
• 135-degree point tip and twist geometry promote fast starts and reduced walk-off
• Self-centering geometry supports precise cuts with minimal wandering
• Inserts are hardened and polished for consistent cutting quality
• 13 sizes from 1/16" to 1/4" cover common drilling tasks
• Indexed storage case simplifies picking the right bit quickly

Materials, performance, and ranges

These bits are designed to handle stainless steel, hardened metal, cast iron, copper, and aluminum, while also performing on softer materials such as plastics and wood. The cobalt alloy helps maintain edge integrity under repeated use, and the left-hand geometry provides an additional option for mixed-material applications where a extractor might come into play. The 135-degree point tip contributes to clean starts, while the polished edges reduce friction and heat buildup during drilling.

Practical use cases

• Maintenance and repair on metal enclosures, brackets, or fasteners that resist removal
• DIY and workshop projects involving metal, wood, or plastic components
• Situations where a screw extractor may be used in conjunction with the left-hand bits

Included storage and care

The kit comes with a compact storage case that includes size indexes for quick organization and transport. Proper storage helps protect edge geometry and keeps your workflow efficient across jobs. If you have questions about the best bit for a task, our team is ready to help you pick the right size and material combination.