ToolPro's Rubber Corner Knife measures 6-1/2 inches across and features a molded-in metal pressure bar for consistent tension and performance. It can be used comfortably by hand or slipped onto any 1-inch diameter extension handle for added reach when working overhead. Its shape also makes it useful for scraping compound out of buckets, adding utility to its already versatile design. Easy to clean and long-lasting, this knife is built for demanding finishing tasks.