Mounts with a 1/4"-20 standard screw Fully Compatible with Nikon and Canon Flashes Fully Compatible with Boomerang Flash Bracket with Anti-Rotation Fully Compatible with PMG Handle with Anti-Rotation Mounts from top of bottom via 1/4"-20 thread Mounts to Paparazzi Bracket 1- 1/4-20 Captive Screw included with 5/32 allen key Works with any 1/4-20 Screw or Thread Hot or cold shoe adapter can be mounted from Top via Captive 1/4-20 screw included or bottom as its threaded Hole for Flash Safety Pin works with Nikon and Canon Screw Stoppers on End prevent slide out.