Smatree Aluminum Thumbscrew/Thumb Knob for Gopro Session, Hero5/4/3/3+/2/1 ( 3PCS, 1 Long + 2 Short) - Purple Aluminum Thumbscrew, High quality stainless Steel Acorn Nut Direct replacement for GoPro Cameras,replace the plastic thumbscrew Help you to easily tighten and loosen screws between mount and camera, and a O-ring helps to prevent camera from abrasion yet not essential for every buyer Color: Purple,make your camera look cool and awesome. Long Thumbscrew is about 2.2inch. Short Thumbscrew is about 1.7inch Package: 1 x Long Thumbscrew with Steel Acorn Nut, 2x Short Thumbscrew with Steel Acorn Nut