#52 size Commercial Meat grinder knife Cutter Blade for Hobart Biro Berkel etc. Size #42 & #52 Blade. Very strong and resharpenable for heavy duty meat grinders. Premium knife for meat grinders, choppers and mixer motors with grinding attachments. Fits electric grinders that use the #42 and #52 size accessories. This blade measures 4 11/16 tip-to-tip. Center square hole is 13/16. 3/4 (22mm) total thickness. This will fit your grinder if your plates are 5 1/8 across.