Size #52 Heavy Grinder replacement knife The "Cuchilla" is the best commercial grade meat grinder knife that you can buy. It is solid Stainless Steel and fully resharpenable. This knife weighs 50% more than a standard stainless swirl knife. It fits all the common manufacturers #52 sizing. The blades are 4 5/8" tip-to-tip. Center square hole is approx. 13/16" wide. They will fit your unit if your plates are approx 5 1/8" across. Smaller sizes also available. Fits Biro, Hobart, Berkel and other very heavy duty meat grinders. We ship Priority Mail same day if possible. Always within 24 hours. FAST! How does combined shipping work? Most of our products qualify for significant combined shipping discounts. When purchasing more than one item, your shipping discount will be automatically calculated at checkout. . View our complete store at https://www.ebay.com/str/butcherbaker