The discs are folded into segments. Directional arrows on the buffs indicate correct rotation to "cut" and "color". Operated in the "cut" direction, the rotation firms up the pockets into an aggressive edge for cutting operations. Reverse the direction and the pockets open up, providing a softer face for flexible coloring-action. 1. Difolods hole compound better making them cut faster. 2. Construction facilitates less sticking on work pieces. 3. Buffs are thicker than ordinary full disc buffs so require fewer sections per wheel(costing less per inch of piece) Diameter: 100-600mm Width: 3 - 20mm Bore: custom-made