Abstract: Disclosed herein are devices for transferring mechanical force from an electric motor to a fishing reel. Also disclosed are method of using devices to transferring mechanical force to a fishing reel. In an exemplary embodiment, the device includes a body that has at least one groove and at least one slot that are configured for removably engaging a crank arm of a fishing reel. The fishing reel crank arm includes a first end attached to a crank knob arm assembly for attaching the crank arm to the reel. The crank arm also has a second end that includes a crank handle shaft projecting from said second end. The body includes, at the first side, a groove defined therein for receiving the crank arm and a slot defined along an edge of the body for removably engaging the crank handle shaft.