Thule Alpine 500 roof handle with a hidden M6 nut inside. The knob is designed so that the nut can be installed from the top, and you can apply strong glue to ensure that it does not move. The thickness is 4 mm between the bottom and the nut, which makes it strong enough if you comply with the settings for side thickness/bottom/top. This handle is ideal for your Thule Alpine 500 roof ski snow case, making the box easier to handle and transport.