IRWIN Drill Bit Set, M35 Cobalt Alloy Steel Steel, 29-Piece (3018002)

The IRWIN 29-Piece Cobalt Alloy Steel Drill Bit Set (model 3018002) is designed for drilling tasks that generate high friction and heat. By incorporating 5% cobalt alloy steel, this set gives metalworkers and trade professionals bits that resist abrasion and high temperatures better than standard drill bits.

A major highlight is the comprehensive size range. The kit includes 29 pieces ranging from 1/16 inch up to 1/2 inch, progressing in precise 1/64-inch increments so you can match the exact hole diameter you need. Each bit features a 135-degree split point, which helps the tip bite directly into the material surface to minimize bit walking at startup.

For structural strength, IRWIN builds these bits with a heavy-duty web construction. This reinforced core helps the bits withstand high torque and heavy drilling pressure across tough materials without flexing excessively.

Trade-offs reflect the specific scope of the listing. The product details specify the metallurgy and sizing but do not describe the included storage case or specify shank shapes for smaller sizes. Cobalt steel is also a premium material choice, which makes this set best reserved for those who genuinely need heavy-duty heat resistance.

Verdict: The IRWIN 3018002 set is a solid, precise choice for anyone tackling high-heat drilling jobs. If you need a comprehensive 29-piece fractional index with 135-degree split points and 5% cobalt alloy steel, this collection delivers dependable strength.

• Brand: IRWIN
• Model Number: 3018002
• Piece Count: 29
• Material: M35 Cobalt Alloy Steel (5% Cobalt)
• Size Range: 1/16 inch to 1/2 inch in 1/64-inch increments
• Point Angle: 135-degree split point
• Core Design: Heavy-duty web construction

A great fit if you:

• Need a comprehensive range of drill bits spanning 1/16 inch to 1/2 inch in 1/64-inch steps
• Drill into tough materials where heat and abrasion resistance are required
• Want 135-degree split point tips that stay on target without wandering

Consider something else if you:

• Only need a few basic sizes for occasional household drilling
• Prefer metric drill bit sizing rather than fractional inch increments

What sizes are included in this 29-piece set?
The set covers sizes from 1/16 inch up to 1/2 inch, increasing in continuous 1/64-inch increments across all 29 bits.

What material is used to make these drill bits?
They are manufactured from M35 cobalt alloy steel featuring 5% cobalt for enhanced heat and abrasion resistance.

What is the benefit of the 135-degree split point?
The 135-degree split point design helps minimize bit walking so the bit bites quickly into your workpiece without sliding across the surface.