Duct Knives / Duct Shop Fabrication processes / By Harry Thompson IV / March 15, 2019 Duct Knives for Fiberglass Liner and Elastomeric Duro Dyne SAK6 — 6″ Stainless Steel Knife with Sheath Includes sheath to keep knife safe when not in use One side serrated, one side smooth Can cut a wide variety of insulation including fiberglass, cotton, and rubber… Cuts fiberglass with ease Cuts rubber effortlessly SAK Knife comes in a sheath with a velcro strap to keep the knife secure Reverse side of the sheath has a convenient loop to attach to your belt Duct Insulation Knife Read more Ductboard Knife Read more Pacific SK504 Utility Retractable Style Knife Read more Malco FDC1 for Flex Duct Read more Straight Blade Shoe Knife Read more DuroDyne 6″ Stainless Steel Duct Knife Read more