Insert hand cut from copper bar on a band saw, .09" diameter hole machined with drill press, prismatic tape applied, skull eyeball design made with SketchBook Pro and printed on vinyl before being installed. Master lure hand is hand lathed, silicon rubber mold made, insert placed into mold, and polyurethane resin is poured into the mold and cured under pressure. Vinyl skirts attached. Wahoos, Marlin, and Tunas beware.