KUDASN thumbscrews for GoPro Hero are a high quality aluminum and steel replacement for your original plastic thumbscrews. It is more solid and can protect your camera better than the plastic one. The screws are easy to tighten and remove. We've included a rubber O-ring which will help to prevent camera from abrasion yet not essential for every buyer. If you prefer to use the screws without the o-ring, simply remove the acorn nut and roll the o-ring off of the screw. There are eight stress surface uniform stress to tighten and it is in an anti-skid design. The long thumbscrew in the pack is for connecting the camera; short screws are for connecting GoPro accessory. Specification: Long Thumbscrew is about 2.2 inch. Short Thumbscrew is about 1.7 inch. Compatible with: GoPro Hero 12, 11, 10, 9, 8, 7, 6, 5, 4, 3+, 3, 2, 1 HD,DJI, AKASO Campark and Other Action Cameras 1x Long Thumbscrew with Steel Acorn Nut 2x Short Thumbscrew with Steel Acorn Nut