Yontree Sharpening Stones for Kitchen Knife Sharpener Professional Sharpening System-stone grit: #180 #400 #800 #1500 #2000 #3000 Material: white corundum Size: 5.90" x 0.78" x0.19" Quantity: 1 set (6 pcs) The whetstones are Light, portable, and Anti-friction For sharpening kitchen knife, scissors, chopper, hand hay cutter, shave knife, axe etc.