HVAC and sheet metal pros agree: When making long, straight cuts in thinner-gauge sheet metal, tinner snips are the way to go. They’re a simple, economical, and durable cutting solution for many sheet metal and HVAC applications. New Crescent Wiss lightweight aluminum and drop-forged steel tinner snips are the most durable we’ve ever made with precision ground cutting edges and an adjustable pivot bolt. Available in a wide selection of styles and sizes, there’s a perfect Crescent Wiss snip for every job. Wiss products have been earning their reputation for craftsmanship and long-life since 1848. Result: Wiss has been the market leading call out brand for aviation snips for over 50-years. The wide product line includes scissors, industrial shears, utility knives, siding and HVAC tools, all with famous Wiss quality built-in.