The roll bar mounting plate option comes with a mounting plate with U bolts. The unit comes with a Quick Release clamp that clamps arca and pic all in the one clamp.
It is designed to bolt on to roll bars or sports bars of vehicles from 60mm to 90mm. Note: If the bar you are intending to mount on to is smaller than 60mm you would need to use a packer to close the gap.
The SpydaBot unit is attached to the base plate via arca clamp and rail which are supplied. See images for reference.