The Serplex putty corner tool helps create neat inside and outside corners during drywall, plaster, and wall repair work. Its paired corner trowels are suited to DIY users, home renovators, and tradespeople who need controlled application along joined surfaces.Use the corner plastering tool for spreading putty, skim coating, and finishing concrete plastering areas. The shaped edges help guide material into corner lines and reduce excess buildup compared with using a flat blade alone. It can also serve as a skim trowel putty set for small repair and finishing tasks.Each corner putty blade is made from stainless steel for repeated use with common putty and plaster materials. The set includes separate tools for internal and external corners, helping you select the appropriate shape for the surface being finished.Apply an even amount of compound, then draw the tool steadily along the joint. Wipe away residue after use and dry the blades before storage. Avoid using the edges to scrape hardened material or other surfaces that may damage the finishing profile.