The TapeTech Corner Finisher is used to perfectly feather both joint compound edges of internal corners in one pass. The Corner Finishers can be used for wall-to-wall internal corners or wall-to-ceiling corners. Corner Finishers, also referred to as Angle Finishers, are attached to a corner applicator (CA07TT or CA08TT) or the 14TT MudRunner® to quickly and professionally finish internal drywall corners. TapeTech Corner Finishers are spring loaded to help compensate for slightly imperfect corners. Use with the FHTT Fiberglass Handle or the XHTT Extension Handle – not included.