Material and weight: Aluminum alloy construction for durability with a small, light form factor. Net weight is 12 g. Antirotation and pinbased securing: Features 3 antireverse positioning pin screw holes with a 9 mm spacing around the four mounting screws. After installing the positioning pin, you can use two 1/4'20 screw holes spaced 9 mm apart to prevent reverse rotation and protect against loosening and potential detachment of attached equipment. Antireverse positioning pin compatibility: Antireverse positioning pin designed for 2x 1/4' screw holes with a 9 mm spacing. bead limit screw: Includes a bead limit screw to secure cold shoe accessories and prevent them from falling off. Function and compatibility: Serves to securely mount and stabilize accessories that use 1/4'20 threads or cold shoe connections, while minimizing unwanted rotation or detachment. Use scenarios: Mount a compact LED light or microphone to a camera rig using the 1/4'20 holes, with the antireverse pin helping to prevent loosening during movement. Attach a small monitor or accessory to a rig or plate via the 1/4'20 holes, using the bead limit screw to keep cold shoe components secure and in place. Integrate into a lightweight handheld rig where preserving gear security without added bulk is important, thanks to the low weight (12 g) and antirotation features.