Abstract: A modular fan assembly includes a fan unit and a mount assembly removably connected to the fan unit. The fan unit may include a fan housing, an impeller disposed within the fan housing, a motor coupled to the impeller to drive the impeller, and first electrical contacts disposed on the fan housing. The first electrical contacts can electrically communicate with the motor. The mount assembly may include a support housing removably connected to at least a portion of the fan housing and second electrical contacts disposed on the support housing. The second electrical contacts can electrically communicate with the first electrical contacts.

Abstract: A screw guide and a method of driving a screw into a work surface utilizing a driving tool and a screw guide. The screw guide having a body configured to be coupled with a rotating clamp of the rotary tool, the body defining a chamber for receiving a screw, and a support member coupled with the body and configured to maintain the screw in an orientation substantially parallel with the axis of the rotating clamp.

Abstract: A line generator includes a housing carrying a light source for emitting a light beam and a mounting surface for removably mounting the generator on a surface. The line generator includes a gravity dial having at least one indicator, wherein when the mounting surface is substantially vertical, the gravity dial will self level under the influence of gravity and the at least one indicator will indicate whether the emitted light beam is in a predetermined orientation selected from one of a vertical line or a horizontal line.

Abstract: A self-leveling line generator may be removably disposable on a surface. The line generator includes a housing carrying a light source for emitting a light beam and a lens holder for carrying a lens that converts the light beam to a planar beam. The lens holder is movable with respect to the light source housing and is self-leveling so that the planar beam is in a fixed orientation on the surface on which the planar beam contacts.

Abstract: A self-leveling line generator may be removably disposable on a surface. The line generator includes a housing carrying a light source for emitting a light beam and a lens holder for carrying a lens that converts the light beam to a planar beam. The lens holder is movable with respect to the light source housing and is self-leveling so that the planar beam is in a fixed orientation on the surface on which the planar beam contacts.

Abstract: A line generator includes a housing carrying a light source for emitting a light beam and a mounting surface for removably mounting the generator on a surface. The line generator includes a gravity dial having at least one indicator, wherein when the mounting surface is substantially vertical, the gravity dial will self level under the influence of gravity and the at least one indicator will indicate whether the emitted light beam is in a predetermined orientation selected from one of a vertical line or a horizontal line.