Features: Aluminum alloy bolt and nut are anti-rust, anti-corrosion, super durable. The thumb knob adopting anti-skid textured plastic material contributes to easy operation. Perfect standard accessories for fixing your camera to a standard tripod, selfie stick, monopod, etc. Easy to tighten and remove. Compatible for Gopro Hero 4/3/3+/2. Totally 3 pcs (2 short and 1 long) come in a package.The long one is used for connecting Gopro camera and Gopro accessories, short ones are used only for Gopro accessories. Specification: Condition: 100% Brand New and High Quality Material: Aluminum Alloy + Plastic Color: Black + Silver Long Screw Size(L x Knob Dia): Approx. 53 x 18 mm / 2.08 x 0.70 inch Short Screw Size(L x Knob Dia): Approx. 40 x 18 mm / 1.57 x 0.70 inch Suit for: Gopro Hero 4/3/3+/2 Quantity: 3Pcs(2 Short 1 long) + 3Pcs Nuts Weight: Approx. 36 g Packing List: 1 x Long Screw 2 x Short Screw 3 x Nuts * The camera, housing and mount adapter appeared in our pictures are not included.