Molding compositions and forming processes for normally rust-prone iron-based powders, and articles produced therefrom. The path-steering device has a first beam-deviation optical element including a first prism structure having a first diffraction grating thereon, and a second beam-deviation optical element including a second prism structure having a second diffraction grating thereon. The tool may include a loop handle, generally in a trapezoid configuration connected to the main tool shaft, for manipulating the tool in service.