Kupo Corner Bolt for Butterfly Frame

The Kupo A-17 Corner Bolt is a die-cast aluminum knob paired with a solid steel bolt threaded 1/4"-20, designed to secure Kupo's FC15A and FC15B corner adapters onto a butterfly frame's tube corners. It clamps the frame joints tight for a rigid, stable rig, and lets the frame break down quickly and compactly for storage and transport between setups.