This is a one-off Titanium and 7075 Aerospace grade Aluminum Machine Clip with black powder coat on the Titanium Gates and Scales, Blue anodized 7075 Screws and Blue Anodized core.  Less than 2" square and Less than 2 oz.  Purple Hyperglow Dayglow, Charges in sunlight for purple glow after dark, with short glow time.

MachineClip PURPLE glow