K&F is among my favorite 3rd party action camera accessory brands, and this item is no different. it easily snaps onto the base of the OP3 via its USB-C port with two metal sides to snap on and secure its position. at the side is a USB-C adapter for a charging cable, and below is a 1/4"-20 mounting hole with two aluminum hinges that come together to produce a standard action camera mount. the included screw and action camera clip are a nice bonus, should you wish to complete the mount that way. of course, the clip needs something to clip onto, assuming that you already have its corresponding buckle accessory. but the design itself doesn't tie you to this type of mount alone, and given its small form factor and light weight, it allows for more minimalist, trouble-free mounting. i would have to say that when mounting your OP3 to the nearby surrounds, don't forget to have an extra wire safety strap (not included) handy to secure it to the location from which you are shooting. i somehow forgot this yesterday, before taking mine to a show. important things. safety first. save the cash, and save the time for your shooting! 5 stars.