[Wide Compatibility]: Compatible with HERO 2018, Fusion, HERO 8 / HERO 7 / HERO 6 / HERO 5 / HERO 4 / HERO 3+ / HERO 3 / HERO 2 / HERO 2 HD / HERO 1 and DJI Osmo Action. 【The kit contains】A total of 3 (2 short and 1 long) are packed together. The long one is for Go pro cameras and for Go pro accessories adapter, and the short one is for Go pro accessories only. compustar [Materials】Made of high quality high-Strength, high rigidity & precision craftsmanship CNC machining Aluminium alloy and Stainless steel, more wearable and durable, provides long life Help you to easily and quick tighten and loosen screws between Gopro mount and camera, and a O-ring helps to prevent camera from abrasion yet not essential for every buye 3 Pack Thumb Screw Set: one long screw (2.2 inch) specifically for GoPro housing and two short screws (1.7 inch) 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