Patent ID: 8047242

Claim:
A power tool comprising: a housing substantially housing a motor-driven spindle assembly supported for rotation about an axis, said spindle assembly including an output spindle having a coupling for releasably securing a tool bit thereto, said spindle assembly further including a plurality of engagement members, at least two engagement members disposed in spaced relationship less than one hundred eighty degrees from each other with respect to the axis of the spindle assembly, the plurality of engagement members comprising a plurality of detents each extending in a radial direction toward the axis and a spindle lock assembly that selectively engages at least one of the plurality of engagement members to lock the spindle assembly against rotation about the axis, the spindle lock assembly including a pin that selectively moves into one of the plurality of detents to lock the spindle assembly against rotation about the axis; wherein the spindle lock assembly includes a button member and a mount, the mount being coupled to the housing, and the button member being movable relative to the mount in a radial direction to cause the pin to move into one of the plurality of detents to lock the spindle assembly against rotation about the axis; and further wherein the button member includes an outer surface that is surrounded by an outer surface of the mount, and at a maximum displacement of the button member relative to the mount toward the axis when the pin is engaged with one of said plurality of detents, the outer surface of the button is substantially flush with the outer surface of the mount.