Material: 420J2, 440 and others Forged or casted Hardness: HRC52-60 Surface: mirror/ rubber satin Size: 5#.8#.10#. 12#. 22#. 32#. 52# W/hub or wo hub Hole diameter: 3-12MM china professional knives meat mincer, meat mincer plate and blades butcher knife, chef knife, slicing knife fishing knife, fish fillet knife, army knife, outdoor knife, camping knife, survival knife bread slicer, spatula, scraper, dough scraper, curved slicer, serrated slicer, china