The Goldblatt 4 in. Stainless Steel Flex Joint-Knife is the go-to knife for professional drywallers, making it perfect for your at-home projects. Crafted with a flexible stainless-steel blade, this joint-knife allows users to complete jobs in comfort while reducing strain. Set nails and screws with ease using the heavy-duty zinc-alloyed hammer-head end. The long-lasting, stainless steel blades mean no rust - even after months of use. You won't find a better, more well-made or flexible joint-knife on the market today. This product can be used for filling holes, covering screws, running corners, basic mudding, smoothing and more. There are many versions of joint knives and taping knives, but the Goldblatt brand is the best.