Patent ID: 8425282

Claim:
A power tool accessory adapted to be mounted to a spindle of a power tool having a power tool housing, the power tool accessory comprising: a hub comprising: a first surface and a second surface opposite to the first surface, an opening extending therethrough, and defining an axis of rotation of the hub through the opening, and a working element connected to the hub; a bolt comprising: a head having a cross-section greater than the opening of the hub, and a shaft adapted to extend through the opening of the hub, wherein the shaft is adapted to be received on the spindle of the power tool; a nut cooperating with the bolt, the nut comprising: a head having a cross-section greater than the opening of the hub, and an aperture extending through the head of the nut, wherein the nut is adapted to be received on the shaft of the bolt; the bolt and the nut mounted to the hub such that when the power tool accessory is mounted to the power tool for operation, the position of the hub relative to the power tool housing is substantially the same regardless of whether the first surface or the second surface of the hub is adjacent to the power tool housing.