TNP Gopro Thumb Screw Set - Aluminum Thumbscrew Stainless Steel Thumb Screw Knob Bolt Kit 3pcs 1x Long Screws + 2x Short Screws for Gopro Hero4 Hero3+ Hero3 Hero2 SJ4000 SJ5000 HD Cameras (Black) These replacement Thumbscrews are perfect for standard accessories of all GoPro Hero Series, use for fixing your GoPro equipments Replacement for GoPro Cameras ( Gopro HD Hero2 & Hero3,Hero3+ Hero 4) Made of high quality high-Strength, high rigidity & precision CNC machining Aluminium alloy and Stainless steel, more wearable and durable, provides long life Help you to easily tighten and loosen screws between Gopro mount and camera, and a O-ring helps to prevent camera from abrasion yet not essential for every buyer 3 pieces a pack: one long screw (2.2 inch);especially for GoPro housing and two short screws (1.7 inch)