Narrow flat box is ideal for tight areas and detail finishing Coat tape-on or nail-on corner bead Use as a screw / nail spotter to fill dimples Fits all leading drywall flat finisher box handles. 5-Year Columbia Taping Tool Manufacturer's Warranty! Columbia 5.5" Detailer Finishing Flat Box...get into those tight drywall finishing areas that previously had to be done by hand. 5.5 " Detailer Flat Finishing box by Columbia Taping tools can be used on any major brand taping tool flat box handle, and can be used for fire tape coating, spotting screws, coating tape-on and nail-on corner beads, as well as finishing tight areas with limited working room. Columbia "No Swell" gasket and stainless steel finishing blade provide many years of reliable service.