Commercial Grade replacement knife This Listing is for the LARGE # 42 size replacement meat grinder knife. Fits many brands including Hobart, Biro and others. (Some Toledo Scale grinders) Super Sharp. Long lasting. No Rust. (Lifetime Guarantee against rust) Size #42 replacement knives Premium Stainless Steel Fits most #42 size Electric grinders with plates that are 5 1/16" across New Swirl Style knives. Replaces the older Straight-bladed carbon steel knives 7/8" (22mm) center square hole 4 5/8" tip-to-tip Will fit your grinder if your plates are 5 1/8" across This knife typically fits most #52 meat grinders