SEDIANAS Cobalt M35 Step Drill Bit 1/4 to 3/4 in | TiAlN Coating | 9 Sizes

Overview

Meet the SEDIANAS Cobalt M35 Step Drill Bit, a versatile tool engineered to handle stainless steel and other materials with lasting precision. Crafted from 5 percent cobalt M35 high speed steel and finished with a TiAlN coating, this bit blends durability with smoother cutting action. Its compact, all-in-one design makes it a practical addition to metalworking, sheet metal, and plastic projects, offering reliable performance without the need to swap bits mid task.

Why it stands out

Designed to support a range of metals and plastics, this drill bit combines performance and convenience in a single tool. The key features work together to improve your drilling experience:

• 5 cobalt M35 HSS base for strength and wear resistance, especially in stainless steel
• TiAlN coating to reduce heat buildup and preserve edge sharpness
• 4 spiral flutes for faster cutting and efficient chip evacuation
• 118 degree split point for self centering and reduced wandering
• Nine sizes in one bit so you can drill a range of holes without changing tools

Real world uses

This multi size bit is well suited for drilling holes in stainless steel, aluminum, iron, copper, and various sheet metals, as well as certain plastics. Practical scenarios include pre drilling for fasteners, creating pilot holes on metal panels, and shaping openings for electrical conduits or hardware fixtures.

• Automotive or appliance assembly tasks involving stainless steel panels
• Sheet metal and aluminum work where multiple hole sizes are needed
• Hobby projects or small workshops requiring a single tool for several hole sizes

Tips for best results: maintain steady feed rates, avoid excessive force, and consider light lubrication on metals to extend tool life. Practically, you can start with a smaller size and step up to the final dimension to reduce resistance and improve hole quality.

Durability and maintenance

The combination of cobalt alloy and TiAlN coating helps the bit resist heat and wear during repeated drilling tasks. Store it dry and clean debris after use to maintain cutting performance over time.

Bottom line

If you need a compact, durable drill bit that covers a wide range of hole sizes for metal and plastic work, this tool offers a convenient and capable option without promising outcomes beyond the task at hand.