Multiform slipstone by Ice Bear 4000 grit
On one edge the radius changes from 13mm(1/2") to 3mm(1/8") over its length. The opposite edge is tapered at an angle of about 40° making it ideal for sharpening the inside of parting tools. The overall design allows the sharpening of a wide variety of tools from flat and wide to small narrow gouges and all vee tools. Size 106(4.1/4) long x 50(2) wide x 9.5mm(3/8") thick.