The SmallRig Cold Shoe (2pcs Pack) is designed for camera cages, top handles, and other supports that offer a 1/4′′-20 threaded hole with an M2.5 threaded hole on the top and bottom of it. The shoe mounts feature the same threaded holes and matching screws are supplied. Two shoe mounts are included for expanding your rig to support additional accessories. Arrow markers on each one indicate which side your accessory should be mounted from. You can also attach these shoe mounts to your rig via the 1/4′′-20 thread alone but without the anti-twist protection that the M2.5 threads are intended to provide.