CAN-AM Applicator Head Inside Corner 1" with 4 WheelsInside Corner Applicators control, and divert the flow of compound onto both sides of 90 inside corners, creating two uniform ribbons of mud in a single smooth action. Smooth rolling wheels guide the head along the wall, and the stainless steel spring clip makes it a snap to attach to any length compound tube. 4 Wheel Featuring four smooth rolling wheels, this model can really up your game, delivering mud along both sides of corners quickly.