I have this screw set uses a BeastVision HD. The BeastVision has the same mounting system as the Gopro and all screws, brackets, etc. GoPro also attached at the BeastVision. Supplied with 3 screws incl. One each small O-ring and nut. In addition, even a wrench. This key is kept in a blue metallic and and the screws in a black metallic. It looks also the same amount of fine. The screws are made of aluminum and stainless steel nuts. The spanner can to loosen or tighten screws use this, but it also fits on the original Gopro screws. If you have oily or times glischige finger, or the screw is very tight, so this part can be very useful to move the screw. It now has a lever extension and gets rid of the screws well or with the spanner. The screws fit very well, are through the screw holes of the various holders of BeastVision and can be also nice screws - they do not slack. If necessary, you can also use the enclosed O rings here. The price is a bit high for 3 screws, but who wants to have absolutely the additional wrench, which should buy this set. It seems to me to have a good quality and I can recommend buying.