Angled front view of the DEWALT 20V MAX 18 gauge metal shears featuring the heavy-duty offset cutting blades designed for clean, burr-free cuts in mild and stainless steel.
Side profile of the DEWALT DCS491B cordless metal shears showcasing the 360-degree tool-free swivel head and the durable brushless motor housing.
Rear angled view of the DEWALT 18 gauge cordless metal shears highlighting the ergonomic D-handle grip, variable speed trigger, and the 20V MAX battery mounting port.
An infographic highlighting the features of the DEWALT 20V MAX Metal Shears. Callouts point to the "LED LIGHT" and the "360 DEGREE SWIVEL HEAD". A 20V MAX Lithium Ion logo is at the bottom.
A professional tradesperson wearing a hard hat and safety gear kneeling on a job site while using the DEWALT 20V MAX cordless metal shears to precisely cut a large galvanized steel ventilation duct.
Informational graphic for the DEWALT DCS491B showing a battery and charger with a strike-through circle, indicating that this is a bare tool and the battery and charger are sold separately.
DEWALT® FLEXVOLT® The Power of Freedom: Skyscraper promotional how to video
Angled front view of the DEWALT 20V MAX 18 gauge metal shears featuring the heavy-duty offset cutting blades designed for clean, burr-free cuts in mild and stainless steel.
Side profile of the DEWALT DCS491B cordless metal shears showcasing the 360-degree tool-free swivel head and the durable brushless motor housing.
Rear angled view of the DEWALT 18 gauge cordless metal shears highlighting the ergonomic D-handle grip, variable speed trigger, and the 20V MAX battery mounting port.
An infographic highlighting the features of the DEWALT 20V MAX Metal Shears. Callouts point to the "LED LIGHT" and the "360 DEGREE SWIVEL HEAD". A 20V MAX Lithium Ion logo is at the bottom.
A professional tradesperson wearing a hard hat and safety gear kneeling on a job site while using the DEWALT 20V MAX cordless metal shears to precisely cut a large galvanized steel ventilation duct.
Informational graphic for the DEWALT DCS491B showing a battery and charger with a strike-through circle, indicating that this is a bare tool and the battery and charger are sold separately.
DEWALT® FLEXVOLT® The Power of Freedom: Skyscraper promotional how to video
DEWALT

DEWALT Metal Shears DCS491B 18 Gauge Bare Tool (20V MAX 360 Swivel Head 2300 SPM 7/32 Cut Strip Mild Stainless Steel HVAC Duct Sheet Cutting)

Only 3 left
SKU: DCS491B
$209.00 USD

Description

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DEWALT DCS491B 20V MAX 18-Gauge Cordless Swivel Head Metal Shears

The DEWALT DCS491B 20V MAX cordless 18-gauge metal shears provide clean, burr-free sheet metal cutting across 18-gauge mild steel and 20-gauge stainless steel with an operating speed of 0 to 2,300 strokes per minute. Featuring a 360-degree tool-free rotating swivel head and an integrated LED worklight, this lightweight 3.9-lb cordless shear allows trade professionals to navigate tight ductwork corners and overhead transitions without wrist strain. Engineered with a double-cut blade system that produces a continuous 7/32-inch curled waste strip, it keeps cutlines visible and material flat during HVAC duct fabrication, metal roofing installation, and automotive body panel trimming.

**Battery and charger sold separately.

Best Used For:

  • HVAC Sheet Metal Duct Fabrication: Trimming galvanized spiral ducting, trunk lines, and plenum take-offs without distorting the metal edges or leaving sharp burrs.
  • Architectural Metal Roofing and Siding: Slicing corrugated panels, flashing, and ridge caps on-site with a 5.5-inch minimum cutting radius for smooth curved contours.
  • Automotive Body and Sheet Metal Trimming: Cutting 18-gauge cold-rolled steel and 20-gauge stainless sheet panels cleanly using a variable-speed trigger for line accuracy.

Key Performance & Safety Features

  • 360-Degree Tool-Free Swivel Head: Rotates smoothly in a complete circle without hand tools to optimize cutting angles and user ergonomics in tight framing spaces.
  • Continuous 7/32-Inch Curled Scrap Action: Double-cut blade action curls waste material away from the work surface to maintain clear cutline visibility and prevent binding.
  • High-Speed 2,300 SPM Motor: Delivers rapid cutting strokes to slice smoothly through 18-gauge mild steel and 20-gauge stainless steel without thermal distortion.
  • Integrated LED Worklight: Illuminates the shear blades and cut path directly to ensure accurate line tracking inside dark attic spaces and unlit mechanical rooms.
  • Variable-Speed Paddle Trigger: Provides granular speed modulation from 0 to 2,300 SPM for controlled starts on layout lines and intricate radius cuts.
  • Lightweight Ergonomic Chassis: Weighs just 3.9 lbs to minimize operator forearm fatigue during extended overhead cutting and vertical panel installations.

What's Included

  • (1) DEWALT DCS491B 20V MAX 18-Gauge Swivel Head Metal Shear (Bare Tool)
  • (1) Blade Alignment Hex Wrench

Technical Specifications

Manufacturer DEWALT Industrial Tool Co.
Model Number DCS491B
System Voltage 20V MAX Lithium-Ion
Tool Configuration Bare Tool (Battery and Charger Sold Separately)
Mild Steel Cutting Capacity 18 Gauge (0.0478 in / 1.21 mm)
Stainless Steel Cutting Capacity 20 Gauge (0.0375 in / 0.95 mm)
Stroke Speed (SPM) 0 - 2,300 SPM (Strokes Per Minute)
Swivel Head Articulation 360-Degree Tool-Free Rotating Head
Minimum Cutting Radius 5.50 inches (139.7 mm)
Waste Cut Strip Width 7/32 inch (0.218 in / 5.55 mm)
Overall Dimensions (L x W x H) 15.94 in x 3.06 in x 6.50 in (404.9 mm x 77.7 mm x 165.1 mm)
Bare Tool Weight 3.90 lbs (1.77 kg)
UPC / Barcode Identification 885911428712

Pro-Tip: Rotate the swivel head 90 degrees when cutting vertical duct seams so the battery pack hangs straight down, keeping the tool balanced and preventing the curling waste strip from scratching the finished panel.