The word nail has two primary meanings: the tough keratin protein covering the tips of fingers and toes (as in fingernails) and the pin-shaped metal fastener used in construction and woodworking. Historically, it also refers to a relic from the crucifixion of Christ, a significant religious artifact. In arts and entertainment, the term appears in the name of the iconic industrial rock band Nine Inch Nails (founded 1988), the powerviolence band Nails (founded 2009), and several films, including the 2017 horror movie Nails directed by Dennis Bartok. It is also a given name and surname, and a nickname for notable figures like baseball player Lenny Dykstra and mobster Samuel Morton. Beyond these, "nail" describes a hard plate on some bird beaks, an archaic unit of measurement equal to one-sixteenth of a base unit, and a soil-stabilization technique called soil nailing. Finally, it appears in businesses like Nails Inc. and Nail Brewing, as well as the 1998 comic book miniseries JLA: The Nail.