TapeTech 4" Corner Flusher can quickly glaze or finish inside corners. Direct flushers can be used to apply joint compound to internal corners. Indirect flushers are used to smooth compound that has been applied by another tool. TapeTech CF40TT flusher can be used as either a direct or indirect flusher. You can simply choose the size flusher to suit your needs without worrying which style to order. The Corner Flusher fist all standard corner boxes, angle boxes, angle head handles or Mudrunner.