An oscillating power tool comprising: a main body housing a motor; a drive mechanism having a main shaft configured to selectively rotate in a first rotational direction and in a second rotational direction, the main shaft rotatable about a first axis; and an output mechanism operatively coupled to the drive mechanism, the output mechanism configured to oscillate, wherein the drive mechanism converts rotation of the main shaft into oscillation of the output mechanism; wherein the drive mechanism includes an eccentric member defining a second axis parallel to and offset from the first axis, the eccentric member movable with respect to the main shaft between a first position having a first offset distance between the second axis and the first axis and a second position having a second offset distance between the second axis and the first axis, wherein the first offset distance is different from the second offset distance, and wherein the first offset distance corresponds to a first degree of oscillation of the output mechanism and the second offset distance corresponds to a second degree of oscillation of the output mechanism, wherein the first degree of oscillation is different from the second degree of oscillation; and characterized in that the main shaft includes a bore receiving the eccentric member, wherein the bore defines a third axis offset from the first axis, wherein the eccentric member is rotatable within the bore between the first position and the second position, and wherein the eccentric member includes an offset tip centered about the second axis, the offset tip being offset from the third axis. a main body housing a motor; a drive mechanism having a main shaft configured to selectively rotate in a first rotational direction and in a second rotational direction, the main shaft rotatable about a first axis; and an output mechanism operatively coupled to the drive mechanism, the output mechanism configured to oscillate, wherein the drive mechanism converts rotation of the main shaft into oscillation of the output mechanism; wherein the drive mechanism includes an eccentric member defining a second axis parallel to and offset from the first axis, the eccentric member movable with respect to the main shaft between a first position having a first offset distance between the second axis and the first axis and a second position having a second offset distance between the second axis and the first axis, wherein the first offset distance is different from the second offset distance, and wherein the first offset distance corresponds to a first degree of oscillation of the output mechanism and the second offset distance corresponds to a second degree of oscillation of the output mechanism, wherein the first degree of oscillation is different from the second degree of oscillation; and characterized in that the main shaft includes a bore receiving the eccentric member, wherein the bore defines a third axis offset from the first axis, wherein the eccentric member is rotatable within the bore between the first position and the second position, and wherein the eccentric member includes an offset tip centered about the second axis, the offset tip being offset from the third axis.