A studio product photograph of the open Irwin 29-piece cobalt drill bit index case, showcasing three tiers of gold-colored twist drill bits rising up in blue plastic organizing cartridges within a grey metal and blue-molded protective shell.
A flat-lay product overview image displaying the complete collection of twenty-nine gold-hued Irwin cobalt drill bits organized by length and diameter against a clean white background.
A front retail product view of the 29-piece Irwin cobalt metal index drill bit set enclosed in its original clear factory plastic blister pack carding, highlighting key features such as the 135-degree split point and reduced 3/8-inch shanks.
A rear perspective product view of the retail blister pack card for the Irwin cobalt drill bit set, detailing structural illustrations on how to open the case, alongside promotional features for the Irwin Unibit step drill line.
A studio product photograph of the Irwin 29-piece cobalt drill bit metal storage case shown fully closed, displaying its grey metal casing, blue hinge accent molding, and the prominent blue Irwin logo stamped across the lock tab.
A digital graphic layout featuring the official yellow Irwin corporate brand logo set directly above the white text reading Drill Bits against a dark blue, textured industrial background.
A studio product photograph of the open Irwin 29-piece cobalt drill bit index case, showcasing three tiers of gold-colored twist drill bits rising up in blue plastic organizing cartridges within a grey metal and blue-molded protective shell.
A flat-lay product overview image displaying the complete collection of twenty-nine gold-hued Irwin cobalt drill bits organized by length and diameter against a clean white background.
A front retail product view of the 29-piece Irwin cobalt metal index drill bit set enclosed in its original clear factory plastic blister pack carding, highlighting key features such as the 135-degree split point and reduced 3/8-inch shanks.
A rear perspective product view of the retail blister pack card for the Irwin cobalt drill bit set, detailing structural illustrations on how to open the case, alongside promotional features for the Irwin Unibit step drill line.
A studio product photograph of the Irwin 29-piece cobalt drill bit metal storage case shown fully closed, displaying its grey metal casing, blue hinge accent molding, and the prominent blue Irwin logo stamped across the lock tab.
A digital graphic layout featuring the official yellow Irwin corporate brand logo set directly above the white text reading Drill Bits against a dark blue, textured industrial background.
IRWIN

Irwin 3018002 29 Piece Cobalt Drill Bit Set M35 Alloy Steel Metal Index 135 Degree Split Point Heavy Duty Industrial Steel Iron Drilling Drill Bits

Only 1 left
SKU: 3018002B
$153.00 USD

Description

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MAXIMUM HEAT RESISTANCE – Industrial 29-Piece M35 Cobalt Alloy Steel Drill Bit Set with 135-Degree No-Walk Split Points

Conquer the most challenging metalworking applications and abrasive structural materials with the extreme durability of the Irwin 29-Piece Cobalt Alloy Steel M35 Metal Index Drill Bit Set (3018002). Engineered explicitly for professional aerospace machinists, automotive fabricators, industrial millwrights, and commercial HVAC mechanical technicians, this master-tier drill bit kit is designed to perform where standard high-speed steel (HSS) bits fail. Forged from premium M35 Cobalt Alloy Steel, these bits are highly heat- and wear-resistant, allowing them to maintain structural sharpness under intense thermal stress. This makes them the ultimate field choice for drilling through notoriously hard, abrasive metals such as hardened stainless steel, high-alloy steel titanium sheets, heavy truck frames, and thick cast iron valves.

Every drill bit in this comprehensive industrial tool kit is structurally optimized to maximize productivity and ensure absolute accuracy. Outfitted with precision-ground 135-degree split points, each bit initiates chips immediately upon contact, completely eliminating frustrating surface walking and ensuring clean, rapid starts without center punching. The set contains a full fractional range from 1/16-inch up to 1/2-inch in exact 1/64-inch increments for flawless workshop coverage. To ensure maximum accessory compatibility across your entire tool inventory, bits larger than 3/8-inch feature a 3/8-inch reduced shank, allowing you to run these large bits in standard hand drills and compact drill press chucks. Housed in a heavy-duty metal index storage case armored with a shock-absorbing rubberized outer shell, complete with removable easy-access bit cartridges and an integrated tap and die selection reference chart, this lifetime-warranted set is built to withstand rigorous industrial abuse.

Key Features

  • Premium M35 Cobalt Core: Infused with heavy-duty M35 cobalt alloy steel to withstand extreme friction temperatures and maintain a sharp cutting edge in tough metals.
  • 135-Degree Precision Split Point: Eliminates drill bit walking across smooth workpieces, starting fast and clean with less downward pressure.
  • Complete 29-Piece Fractional Range: Supplies an exhaustive assortment from 1/16 in. up to 1/2 in. in fine 1/64 in. step increments for precise hole dimensioning.
  • Universal 3/8-Inch Reduced Shanks: Bits larger than 3/8-inch are engineered with scaled-down shanks to easily fit standard 3/8-inch chuck hand drills and drill presses.
  • Armored Metal Storage Index: Heavy-duty metal indexing case features a shock-absorbing protective rubber shell and removable cartridges to protect bits on the jobsite.
  • Tap and Die Reference Chart: Integrated sizing graphics are pre-printed inside the storage case for rapid tap-drill pair matching and layout verification.
  • Industrial Strength Applications: The ideal drill bit assortment for boring clean holes into high-alloy steel, stainless steel plate, cast iron blocks, and titanium.

What's Included

  • 29 × Irwin M35 Cobalt Alloy Steel Drill Bits (1/16 in. to 1/2 in. in 1/64 in. Increments)
  • 1 × Heavy-Duty Metal Storage Index Case with Protective Rubber Shell
  • 2 × Removable Quick-Access Twist Drill Bit Cartridges
  • 1 × Integrated Tap, Die, and Drill Bit Selection Reference Chart

Specifications

Specification Field Product Details
Brand Manufacturer Irwin Industrial Tools
Model Part Number (OEM) 3018002
Tool Core Material M35 Cobalt Alloy Steel
Drill Bit Point Angle 135-Degree Split Point
Total Piece Kit Count 29 Cutting Accessories Included
Bit Size Range Coverage 1/16 Inch to 1/2 Inch
Bit Sizing Steps 1/64-Inch Incremental Progression
Shank Pattern Configuration Straight / Reduced 3/8-Inch Shank on Bits over 3/8"
Case Construction Shell Heavy-Duty Foldable Metal with Protective Rubber Mold
Primary Material Suitability Stainless Steel, High-Alloy Steel, Cast Iron, Titanium, Hard Metals
Net Hardware Freight Weight 4.75 lbs
California Proposition 65 Yes (Warning: Harmful Chemicals / Cancer Defense Protocol)
Universal Product Barcode (UPC) 024721065131
Manufacturer Warranty Terms Limited Lifetime Warranty Protection


💡 PRO-TIP: Unlike standard high-speed steel bits that require high-speed spinning, M35 Cobalt alloy steel tools perform best at lower rotational speeds (RPM) combined with heavy, consistent feed pressure! When boring deep holes into hard alloy metal or thick stainless steel plate, always run your drill on its lower speed gear and deploy a dedicated high-grade cutting fluid or lubrication oil. Keeping the RPM low and the bit constantly cutting—rather than spinning loosely over the metal surface—completely prevents the workpiece from work-hardening, preserves your split-point sharpness, and keeps your industrial bits cutting like new!