The Tool makes it easy to tighten your GoPro thumb screws to prevent the camera from shifting during high-speed, high-vibration activities. Whether youre headed surfing, skydiving or off-road racing, The Tool delivers the extra torque you need to get your thumb screws tighter than you can by hand. Its perfect when mounting the camera using multiple extension arms, or adjusting thumb screws in cold conditions with numb fingers. Internal size: H14.5, W3, D0.6cm.