Abstract: An adjustable knockdown tool includes a coupling member, a blade support, and an actuator. The coupling member includes a housing defining a channel. The housing includes an actuator receptacle and a locking element that is located between the actuator receptacle and the channel. The locking element is movable between locking and releasing positions. The blade support extends through the channel and is coupled to a blade member. The blade support is rotatable relative to the channel when the locking element is at the releasing position so as to change an angle of the blade member, and the blade support is fixed relative to the channel when the locking element is at the locking position so as to fix the angle of the blade member. The actuator is configured to be coupled to the actuator receptacle to cause the locking element to move from the releasing to the locking position.

Abstract: A drywall butt joint system for efficiently recessing a butt joint between two sheets of drywall. The drywall butt joint system is comprised of an elongate structure having a middle section, a first angled section and a second angled section extending from opposing edges of the middle section, and a first section and a second section extending from the opposing angled sections substantially parallel to the middle section. A first support and a second support are preferably attached to the outer edges of the first section and second section respectively in a manner traverse to the middle section thereby increasing the overall strength of the drywall butt joint system. The elongate structure is preferably roll formed from a sheet of metal for increased strength and decreased manufacturing cost.