Wolff Industrial Twice as Sharp Scissor Sharpening System 110V Sharpening Arms  Double-sealed Rulon bearings, no maintenance required Sharpening Clamp  Set angles from 0  57 degrees, clamp opens to  of an inch harpening Wheel  5 x  x  100 grit fine grain friable aluminum oxide Honing Wheel  Nylon impregnated (350 grit) with fine silicon carbide Designed for In-House Factory Sharpening