IRWIN 2084400 Bi-Metal Heavy-Duty Utility Knife Blades (100-Pack) Review (2026)
By The DIYPicks Team · Updated July 2026
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- Drywall
- Cardboard
- Carpet
- General cutting
A high-value bulk pack of durable bi-metal blades for anyone who burns through utility blades on drywall and boxes.
Pros
- Bi-metal build flexes instead of snapping, so tips do not shatter under side load
- IRWIN rates the edge to last roughly 3x a standard carbon blade
- 100-pack with dispenser drives cost down to pennies per blade for high-volume work
Cons
- Standard 2-notch shape does not fit snap-off or hook-blade knives
- Straight edge is wrong for cutting shingles, where a hook blade is safer
- Loose 100-count blades are a storage and safety hazard without the dispenser
Specifications
| TPI | n/a (straight edge) |
|---|---|
| Length | Standard 2-3/8 in trapezoid |
| Material | Bi-metal |
| Shank | Standard 2-notch utility |
| Best cut | Drywall, roofing, carpet, cardboard |