MACXCOIP Cobalt Number Size Drill Bit Set, 60-Piece – M35 Cobalt HSS for Hardened Metals

Overview

Meet the MACXCOIP Cobalt Number Size Drill Bit Set, a versatile 60-piece kit designed to tackle a wide range of materials with confidence. The set spans sizes from #1 to #60, offering holes from roughly 0.228 inches down to 0.040 inches (5.79 mm to 1.02 mm). This broad scope supports both delicate pilot work and larger through holes, making it a practical addition to home workshops, garages, and professional shops alike. The bits are engineered for a crisp edge and reliable cutting performance across metals, plastics, and wood.

Key benefits at a glance

• Wide range of sizes from 0.040 to 0.228 inches, enabling precise incremental drilling
• M35 cobalt alloy delivers durability and sharpness for tougher materials
• 135 degree point tip with self centering twist for faster starts and reduced wandering
• HSS cobalt construction with hardened, polished inserts for precise cuts and longer life

• Compatible with stainless steel, iron castings, copper, aluminum, and more, plus plastics and wood
• Includes an index storage case for organized, quick access during projects
• Efficient chip and particle removal supports smooth drilling progress
• Clear guidance to maintain a vertical angle and avoid bit binding for best results

The set uses M35 cobalt chemistry, known for hardness and heat resistance, helping edges stay sharp through repeated use. The 135 degree tip bites into material with minimal wobble, while the self centering design reduces wandering on small holes. With 60 distinct sizes, you can start with a small pilot and step up to larger holes as needed, adapting quickly to diverse tasks.

Real life use scenarios

• Home workshops drilling stainless steel brackets, aluminum profiles, or copper fittings
• DIY projects in wood and plastics where clean entry and precise hole diameter matter
• Light fabrication tasks in metalworking, cabinetry, or automotive tweaks

Tips for best results

Before drilling, secure the workpiece and ensure the bit is oriented vertically. If a bit binds or stalls, reposition and apply steady downward pressure while keeping alignment with the hole. If a bit becomes lodged, remove it vertically to avoid breakage and repeat as needed.

Whether updating a tool kit or tackling a one off project, this MACXCOIP set provides a broad selection of sizes and a durable build that can support a range of everyday tasks while staying organized in the included case. Consider it a flexible option for projects that require multiple hole sizes and reliable performance.