If you’re searching for a versatile metal shear attachment, the DeWalt 18GA Shear Attachment, model DWAHRIR, is a top choice. It turns your impact driver or drill into a powerful cutting tool. This impact-ready accessory cuts through 18-gauge sheet metal, corrugated metal, HVAC ducts, vinyl siding, steel mesh, wire, plastics, cardboard, and asphalt shingles.
Its 360-degree swivel head offers exceptional maneuverability. It’s perfect for curves, tight spaces, roofing repairs, or full HVAC installations. Compatible with most 18V-20V cordless tools via a 1/4-inch hex shank, it’s a great addition to your DIY or pro kit.
Key Features of the DeWalt DWASHRIR Shear Attachment
- Cutting Capacity: Handles up to 18-gauge material. Includes sheet metal, corrugated panels, ducts, vinyl siding, steel mesh, wire, plastics, cardboard, rubber, and asphalt shingles.
- 360-Degree Swivel Head: Provides flexibility for tight spots and curved cuts. Ideal for HVAC, roofing, and metal fabrication.
- Compatibility: Fits most impact drivers and drills with a 1/4-inch hex shank. No adapters needed, unlike DeWalt’s newer Impact Connect line.
- Lightweight Design: Weighs under 2 pounds. Reduces fatigue during long use.
- Replaceable Blades: Durable blades last years. Easy to replace.
Personal Experience: 8+ Years of Reliable Performance
I’ve used the DeWalt DWASHRIR for over eight years on many projects. From HVAC installs to roofing repairs to wire mesh cutting, it’s held up well. I’m still on the original blades, which shows its quality and longevity. I also use it to cut 16GA metal strap.
This tool is a reliable alternative to dedicated shears. It delivers clean cuts consistently. Its durability makes it a worthwhile investment for frequent users.
Pros and Cons Based on User Reviews
Pros
- Exceptional durability and blade life, even after heavy use.
- Versatile for materials beyond metal.
- Budget-friendly alternative to standalone shears. Priced around $70-$80.
- Easy attachment. No extra parts.
- Produces two straight edges, one flat edge and one wavy edge. Good enough for most HVAC applications.
- Rated for 18-guage but capable of cutting thicker 16-guage strap.
- Works on most brands impact drivers and drills.
Cons
- Leaves one wavy edge. Unlike double-cut shears with two flat edges.
Alternatives to the DeWalt DWASHRIR
If the DWASHRIR isn’t right, try these options. Each offers unique features for different needs.
- Malco or Kett Shears: Cleaner cuts with fewer wavy edges. Steeper learning curve.
- Milwaukee Battery-Powered Shears: Cordless for heavy-duty cutting. More expensive.
- DeWalt DCS496B Swivel Head Offset Shears: Dedicated tool for precision offset cuts. Ideal for users needing more accuracy.
See the DeWalt DWASHRIR in Action
Watch this video review to see how the DeWalt shear attachment performs on real projects. It demonstrates its cutting capabilities and ease of use.
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DeWalt 18GA Metal Shear Attachment (DWASHRIR)

This DeWalt shear attachment stands out as one of the best options for transforming your cordless drill into a metal cutting powerhouse. Whether you’re handling HVAC, roofing, or general metalwork, its affordability, durability, and versatility make it a smart investment. It’s highly recommended.





