Zelmer Meat Grinder Knife Set 10003883 ZMMA028X (2 pcs.) D=55.5mm s=5mm Bore=10x10mm NR8 (double sided) | Factory number: 00000028714 Parameters: Type of sharpening: Double-sided Diameter, mm: 55.5 Hole dimensions, mm X mm: 10x10 Thickness, mm: 5 Hole shape: Square