The Manfrotto 361 Shoulder Brace for Monopods is a bracket that fits against the shoulder to provide extra support and greater stability to a monopod. One end connects to the top of the monopod via the monopod's 3/8" screw, and the other end features a curved shoulder support, with an adjustable pivoting arm in between.
When it arrived, the thread was not well formed so I needed to fix it just to use it. Fortunately I had a tap and die set and was able to fix it and be usable. While I used it, I quickly found I like it and it works well to help stabilize my camera. However on my 6th it 7th time using it, it broke. It is a plastic unit and there are two clips which good the arm to the swivel which mounts on the monopod. One of the two clips snapped. I wrote an email to the company that does the warranty work in the USA a few days ago, and it has been 3 full business days without any response. Right now, I'd say avoid this product, and until I see how the warranty company deals with it, I'm going to avoid all manfroto and related products serviced by that company. Be aware, this is a repeat review in order to add photos of broken area. Also, it has been 6 full business days without a response from my email to the warranty service company for the USA. B&H please delete similar review without the images.
This lightweight (& well-designed) accessory helps me keep the monopod stablized, but still mobile. The mounting plate has a locking button which allows one to securely attach the should brace to the monopod.