Oscillating power tools and accessories

An accessory for coupling to an attachment mechanism of an oscillating power tool includes a working end， an opposite rear end， and a fitment portion adjacent the rear end portion. The fitment portion includes a central opening having a central portion and a rearward portion open to the rear end， and configured to receive a post of a tool clamping mechanism. The fitment portion further includes a first plurality of openings in communication with and extending radially outward from the central portion， a second plurality of openings not in communication with and positioned radially outward from the central portion. The central portion， the first plurality of openings， and the second plurality of openings are configured to couple the fitment portion to a plurality of different configurations of attachment mechanisms for oscillating power tools.