The holder makes a very solid impression. Thick material, tough plastic, rubber fogging everywhere The mouth has a strong bite and opens to a whopping 2.8 cm in the middle and even 3.5 cm at the very front. Can you securely clamp anywhere you want. Threading into the GP recording is fiddly as it is very tight. In return, you get super friction. The screw, on the other hand, is crap, a normal machine screw that is not firmly encapsulated in the plastic part. Come along when you try to thread them into the tight GP holder. The GP grommets sit on a swivel joint which, when new, has enough friction even for heavy setups. Can be rotated 180° with a hard stop. You can also remove the entire swivel joint with the GP mount. With a trial slider, this is tight and wobble-free, but where is the point? Other points of criticism include the magnet... yes, it works. With slightly heavier equipment, especially because of the rubberized back. But it's not really firm. So on the roof of the car and then with me - NO WAY. And there are magnetic holders that do that! The quality of the part is significantly higher than all the sour cream, which you get partially turned on, you get something suitable and hopefully durable (swivel...) material. I subtract one star because of the weaknesses mentioned above.