Abstract: A back-up pad for supporting an abrasive article is disclosed. The back-up pad includes an engagement assembly bonded to a first major surface. The engagement assembly includes a first region including a plurality of first engagement means having a first durability. The engagement assembly also includes a second region including a plurality of second attachment means having a second durability. The first engagement means have a substantially higher durability than the second engagement means.

Abstract: A holder for an abrasive disc allows for a quick manual change of the abrasive disc. The holder including an uncoupling mechanism that in turn includes a handle comprising a pin and an adjacent hub comprising a partial annular channel. The handle and hub have a limited rotational engagement wherein the pin travels in the channel. When an operator desires to replace an abrasive disc, the operator grasps the handle with one hand and rotates the disc, face plate, and hub, together as a unit, with the other hand. This counter-rotation breaks the tight attachment of the disc on the shaft of the finishing tool, so that disc can be easily unthreaded from the shaft.

Abstract: A holder for an abrasive disc allows for a quick manual change of the abrasive disc. The holder including an uncoupling mechanism that in turn includes a handle comprising a pin and an adjacent hub comprising a partial annular channel. The handle and hub have a limited rotational engagement wherein the pin travels in the channel. When an operator desires to replace an abrasive disc, the operator grasps the handle with one hand and rotates the disc, face plate, and hub, together as a unit, with the other hand. This counter-rotation breaks the tight attachment of the disc on the shaft of the finishing tool, so that disc can be easily unthreaded from the shaft.

Abstract: A clamp for a dispersive electrode is disclosed. The clamp includes (a) a housing having an exterior surface, an interior surface being formed within the housing for receiving projecting tabs of the electrode, and a slot in the housing disposed between the exterior surface and the interior surface; (b) a mechanism for releasably engaging the tabs at the interior surface; (c) a reinforcement on the releasably engagement means; and (d) a slot on the exterior surface of the housing having a shape matching the reinforcement.