The MA-CSA Cold Shoe Adapter from iFootage is a cold shoe accessory mount that attaches to the Spider Crab Magic Arm via a fast and reliable quick release system. It is part of a modular system that puts a large variety of accessories at your fingertips.
High quality metal and machining. I would absolutely buy it again. Side note: I've been impressed with each of the iFootage products I've bought. Specifically, for the price paid, I couldn't be happier. (Nobody is encouraging me to say this, I just want to applaud the products I'm grateful for.)