Smith's Replaceable Fillet Blades Electric Fillet Knife - Smith's replaceable fillet blades are compatible with all Smith's electric knife products. Super sharp and easy to install. Storing your blades has never been safer than the ridged sheath that will protect you and your blades. 8in stainless steel electric fillet blade Tough skin and bones are no match for the serrated blades Protective Sheath: Includes breathable hard sheath Fits all Smith's electric fillet knives Installs in Seconds