Abstract: A flexible shaft drive transmission for a power driven tool. The transmission features a first end connectable to a drive motor and a second end connectable to the power driven tool. The transmission includes a flexible drive shaft assembly comprising a flexible elongated drive transmitting member, a first end of the drive transmitting member including a first coupling operatively coupled to the drive motor and a second end of the drive transmitting member including a second coupling operatively coupled to the power driven tool. The transmission further includes a tubular casing surrounding and coaxial with said drive shaft assembly and supporting said drive shaft assembly for rotation generally about a longitudinal axis of said drive shaft assembly relative to said casing. The casing includes a core comprising a spiral wound strip of material having interlocking opposing edges, a braided wire layer surrounding the core, and a polymer layer surrounding the braided wire layer.