From the Manufacturer
Marshalltown 16144 12 X 3-3/16 Pro-Style Blue Steel Taping Knife with Molded Handle is a flexible blue spring steel blade that is tapered for corner work. The lightweight handle is molded to an aluminum backing plate and is plastic contoured. This is the most lightweight, yet durable taping knife on the market.
12" x 3", Pro-Style Taping Knife, Features A Flexible Blue Steel Blade That Is Tapered & Very Lightweight, Durable & Contoured Plastic Handle Is Molded To Aluminum Backing Plate, Made In USA.