This is a one-off Titanium and 7075 Aerospace grade Aluminum Machine Clip with black powder coat on the Titanium Gates and Scales, Black Oxide Screws and Blue Anodized core.  Less than 2" square and Less than 2 oz.  Embrite glow, Invisible by day, Charges in sunlight for Green/Blue/Green glow after dark, with moderate-long glow time.

MachineClip Alt glow GBG