Taking its name from the transparent orb of light in the movie 2001: A Space Odyssey, this futuristic clicker features five points enclosed by negative space cutouts, striking a perfect balance of light and shadow. Each ring has a hinged clasp for easy insertion and removal.

Cast in stainless steel, these are sturdy and nonreactive when worn. Options include “nude” steel, with no plating; black PVD-coated stainless steel; and yellow- and rose-gold-plating over yellow-PVD-coated stainless steel.