CNC machined from billet aluminum Nostalgia line designed to match Nostalgia line of products Available in Black Ops™, Contrast Cut™, chrome finishes or Machine Ops™ Machine Ops™, RSD's newest finish, is a fusion of textured natural aluminum and detailed machining that exposes the true beauty of our aluminum alloy, then dips the fresh machined parts in a slick clear anodize to protect the surface while keeping its raw aesthetic protected Made in the U.S.A.