When modern drywall was introduced in 1936 it was Hyde the industry called on to design what became the drywall joint knife that we all still use today. For decades before and after that call it was Hyde that supplied the tools of choice for professional painters drywall pros wallpaper hangers and other tradesmen. Brand Name: Hyde Blade Width: 2-1/2 in. Blade Material: High Carbon Steel Blade Type: Double Edge Product Type: Scraper Blade Number in Package: 1 pk Packaging Type: Carded