Front upright view of the Crescent WS3N straight hand seamer with orange handles and a 3-inch silver jaw.
Angled upright view of the Crescent WS3N hand seamer with orange handles and rectangular silver seaming jaw.
Close-up of the WS3N hand seamer jaw showing 1/4-inch depth markings, Crescent logo, latch, and pivot hardware.
Close-up of the WS3N hand seamer orange handles, grip texture, latch, and black pivot hardware.
Gloved worker uses a Crescent WS3N hand seamer to bend sheet metal beside ductwork on a jobsite.
Crescent 3-inch straight hand seamer infographic showing specialty grips, ergonomic latch, and 1/4-inch depth markings.

3" Straight Hand Seamer

WS3N
The Crescent Wiss 3" HVAC Sheet Metal Hand Seamer is designed for HVAC professionals, sheet metal fabricators, and contractors who need precise control when bending, flattening, and forming sheet metal. The forged jaws and straight-handle design provide excellent leverage for creating clean bends, flattening seams, and making adjustments during ductwork fabrication and installation. Easy-to-read 1/4" depth markings help maintain consistency, while the ergonomic cushion grips improve comfort during repetitive tasks. Ideal for HVAC ductwork, flashing, and sheet metal fabrication applications, this hand seamer delivers accurate results on the jobsite or in the shop.
  • Features
    • Used for bending and flattening sheet metal
    • Optimal handle span for maximum power and comfortable operating range
    • Ergonomic, single material non-slip handle grips provide excellent control and easy cleaning with built-in hang hole for convenient storage
    • Handle latch keeps blades closed during storage or when not in use
    • 1/4" depth markings
    • Produces a permanent, tight-fitting seam
  • Specifications
    • Weight (Catalog) : 1.35 lb
    • Warranty : Full Lifetime
    • Type : Seamer
    • Overall Length : 9.25 in
    • Overall Width : 3.00 in
    • Locking : Yes
    • Overall Height : 3.25 in
    • UPC : 037103307880
    • Prop 65 : WARNING: This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer, birth defects or other reproductive harm.
    • Handed : Both
    • Material : Alloy Steel
    • Jaw Capacity : 3.25 in
    • Jaw Width : 3.25 in
    • Weight (Catalog) : 1.35 lb
    • Warranty : Full Lifetime
    • Type : Seamer
    • Overall Length : 9.25 in
    • Overall Width : 3.00 in
    • Locking : Yes
    • Overall Height : 3.25 in
    • UPC : 037103307880
    • Prop 65 : WARNING: This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer, birth defects or other reproductive harm.
    • Handed : Both
    • Material : Alloy Steel
    • Jaw Capacity : 3.25 in
    • Jaw Width : 3.25 in
    • Blade Material : High Carbon Steel
    • Color : Rawhide
    • Packaging : Carded
    • Handle Color : Rawhide
    • Handle Material : Non-Slip Cushion Grip
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  • Frequently Asked Questions
    What is a hand seamer used for?
    A hand seamer is used to bend, flatten, fold, and form sheet metal during HVAC ductwork fabrication, installation, and repair.
    Can this hand seamer be used for HVAC ductwork?
    Yes. This hand seamer is designed for HVAC sheet metal applications, including duct fabrication, fitting adjustments, seam flattening, and forming bends.
    What are the depth markings used for?
    The 1/4" depth markings help users create more accurate and consistent bends and folds when working with sheet metal.
    What trades commonly use a hand seamer?
    HVAC technicians, sheet metal workers, roofing contractors, mechanical contractors, and maintenance professionals commonly use hand seamers when fabricating or repairing metal components.
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