Description: Compatible with GoPro Hero 4/3 + / 3/2/1 origin screws. (GP08) It will help you to secure your camera a lot tighter than trying to tighten it by hand. Works especially well when trying to install the camera with multiple extensions and more force needed tightening the knobs. Light weighted and portable. Specification: Length:72mm Width:23mm Material:Aluminum alloy Package Includes: 1x A aluminum wrench + lanyard