Norton Grey Hinged Oilstone Box Professional Machine #3501616 is a Type 4A2P

#3501616 is a Type 4A2P Diamond Grit Wheel for Face

It has superior abrasion resistance and thermal conductivity to ordinary abrasives like aluminum oxide or silicon carbide

Due to their tendency to wear concave

The faceted handle

Norton Grey Hinged Oilstone Box Professional Machine #3501616 is a Type 4A2PReplacement box for Norton 8" x 3" x 1 2" Oil Stones and Arkansas Stones. This case replaces your worn out or cracked base for your Norton oil stones. Each box is hinged on one side with corner brackets on the lid. Set your water stone on top of the case to sharpen your tools and knives. Four sturdy rubber feet hold the case in place when in use. The box is gray in color. Norton Part# 699366 88098