These video was
https://www.softdraft.com/product/u-bolts
Select from a list of U-Bolt sizes starting at 1/2″ through 36″ which can be modified by the user adding or removing sizes as required. After selecting the size you can modify the different parameters for the U-bolt. A material thickness is specified at placement time. Select two points for the material thickness and rotation angle and the U-Bolt is added.