This GoPro Tightening Thumb Screw Fish Bone Spanner Aluminum Wrench for GoPro Hero 1, Hero 2, Hero 3, Hero 3 / Hero 3 Plus and Hero 4 Camera - Red is perfectly shaped to fit the knob on the GoPro thumbscrew. It provides extra torque so you can tighten the thumbscrew firmly to secure the camera or loosen it if secured too tightly to unscrew by hand. Fashion fish bone design makes it more eye-catching.