The 3 Legged Thing AirHed 3 Magnesium Plate is a quick-release camera plate for the company's AirHed ball head. At 3" long, it's quite a bit longer than the standard AirHed plate. The AirHed 3 plate features standard Arca-style grooves for easy, secure fastening to many other Arca-style heads, such as those from Really Right Stuff and other manufacturers.
The copper-brown plate is compatible with BlackRapid's R-Strap camera slings, by way of its FastenR-T1 camera screw. The 1/4"-20 camera screw's flip-up D-ring allows you to tighten it to your camera easily. This ring allows you to attach your camera to an R-Strap and quickly move it from around your neck or shoulder to a head without removing the sling.