Dexter-Russell 8″ Tiger Edge Insulation Knife is an 8-inch Tiger Edge serrated insulation knife — toothed scalloped pattern engineered to cut fiberglass, mineral wool, foam board, and rigid polyiso without binding. Dexter blades are forged from high-carbon stainless or DEXSTEEL alloy and individually ground on the bevel — meaning each blade gets a final sharpening pass by hand rather than coming off a stamping machine. The NSF certification on commercial models tracks the food-safe handle materials and ease-of-cleaning standard.
This works for insulation contractors, HVAC installers, framers cutting board insulation, and homeowners doing energy retrofits. Dexter-Russell knives are the trade-default in American foodservice — diners, butcher shops, fish markets, pizzerias, bakeries, and commercial kitchens have run them for generations. The blades resharpen well, the handles don’t loosen, and the steel holds an edge through restaurant-volume use.
Dexter-Russell has manufactured commercial cutlery in Southbridge, Massachusetts since 1818 — the oldest continuous American cutlery manufacturer. The catalog covers SANI-SAFE plastic-handle commercial knives, Traditional rosewood-handle chef knives, Basics, V-Lo, iCut-PRO, and specialty profiles (pizza cutters, fillet knives, bread slicers, dough scrapers, insulation knives, hamburger turners). Made in USA.
