TapeTech® Inside 90 Degree Applicator Heads apply a consistent base coat of joint compound for the cleanest and most efficient installation of paper-faced corner bead. Simply attach this head to your corner box, MudRunner or compound tube (sold separately) and run it down the internal 90 corners. It will leave a nice, consistent bead of mud for you to stick your paper tape to.
TapeTech stands behind their drywall taping tools with a 5 Year Warranty!
The above link opens a separate window to view our parts breakdown from our Drop Box account.