Morakniv Craftsmen 7350 Insulation Knife with Serrated Stainless Steel Blade, 13.8-Inch Professional grade trade knife with serrated stainless steel blade Extra-long serrated blade for cutting insulation Ample-sized plastic handle to fit your hand even when wearing gloves Limited lifetime manufacturers warranty. Blade Thickness: 0.06" (1.5 mm), Blade Length: 13.8" (350 mm), Total Length: 19.7" (500 mm), Weight: 8.4 oz. (238g)