The Estwing T3-18 Tinner’s Hammer is an 18-ounce specialty hammer for sheet-metal work — HVAC ductwork, metal flashing, gutter and downspout fabrication, and any tinner’s-trade application. The square flat face delivers wide-area strike pressure for forming and seaming sheet metal, and the offset claw head pulls staples and small fasteners common in metal work.
Use it as the primary HVAC tinner’s hammer for sheet-metal duct fabrication, a metal-flashing forming hammer for roofers, a gutter and downspout fabrication hammer, an old-house restoration tool for original tin-ceiling work, and any sheet-metal trade application. The forged single-piece steel construction eliminates the head-to-handle joint that wood-handle tinner’s hammers eventually surrender.
Estwing has been forging American hammers in Rockford, Illinois since 1923 — over 100 years of US tool making. Estwing’s E-series and T-series hammers are forged from American steel and carry the company’s lifetime warranty.






