Conventional Construction Clean the drywall joints, fill the joints with caulking plaster, then pour in white latex, using the tool to stick the joint tape in the center of the joint. The tape applicator and tape knife are also suitable for inner corners, edges, and all types of partitions and walls. Time-saving and EfficientThe quick-change inner corner applicator wheel can be easily reversed with the flat applicator wheel. The tape applicator and tape knife reduce movement. No need, reduce the risk of back pain to almost 0! Double Adjustable Handle StrapsOne on each side, suitable for right-handed or left-handed use. The drywall banjo has a practical ergonomic design and can be operated in any direction. Avoid bending your back In addition to ensuring even results, the tape applicator and tape knife are equipped with padded handles for precise and enjoyable work. No Connection LiabilityThe simple latch with hinged lid opens easily and quickly to load tape and mud. The durable polycarbonate body prevents dents, bumps and bent parts, thereby extending the service life. Tape applicators and tape knives are the best tools for tightening wall joints. [Working Principle] Loosen the joint banjo; Pour the mixture inside; Start to partition the compaction of the cast iron; Cut the joint with the alignment blade; Use the big wheel when turning corners and the gear when turning straight surfaces.