Insulation Material Knife 270 mm with Wooden Handle Universal knife for all insulation materials Product advantages:275 mm long, double-sided blade with special serration for various insulation materials ground wavy serration for soft, light and voluminous materials saw serration for dense and hard insulation materials Technical specifications Blade length: 275 mm Handle: Wooden handle Blade material: Stainless steel Other product specifications: double-sided serrated blade: wavy serration/saw serration