Patent ID: 8117950

Claim:
An extension shaft for holding a tool for rotary driven motion, the extension shaft having an axis and capable of being adapted to a handheld instrument having a chuck, the extension shaft comprising, in combination: a first end adapted to cooperate with the chuck and a second end adapted to hold the tool for rotary driven motion, the first end of the extension shaft and the chuck having complementarily shaped non-circular cross-sections; the second end of the extension shaft including a tool holder for holding the tool for rotary driven motion thereof, the tool holder and the tool having complementarily shaped non-circular cross-sections, the tool holder further including a base portion and a swivel portion, the swivel portion being capable of holding the tool and further being pivotly coupled to the base portion through a pivot assembly, wherein the tool is capable of being rotated about an angle with respect to an axis of the chuck through rotation of the extension shalt in response to rotation of the chuck; and, a spacer disposed between the base portion and the swivel portion.