Phillips gripSTIK transition caps are designed to eliminate gaps between bullnose corner bead and baseboard or crown molding by transitioning bullnose corners to 90 corners. Phillips transition caps install quickly and easily using standard industry practice and can be used with Phillips metal, vinyl or paper faced metal corner beads. Perforated to enhance mud adhesion. Designed to transition from 3/4" Bullnose to 90 . Does not feature alignment tabs for those who prefer it.