For drywall pros searching for new ways to speed up their finishing jobs, we have the solution you’re looking for: Fast Cap. Use this on doorways, wall ends, knee walls and closets to totally eliminate the need for finishing drywall faces and corner beads. 4 5⁄8" Fast Cap is designed for 2x4 wood studs only; the 4 ⅞" Fast Cap can be used with wood studs or 3 5⁄8" metal studs. Fast Cap 3 ½" and 3 ¾" are designed to be used with 2 ½" metal studs.
(Disclaimer: Measuring the pieces with my measuring tape I am getting a 5" read on the width. I know they are Trim-Tex Fast Caps)
2 pieces 6 bucks each. left over materials from job.