I am not a mechanical component inclined person and when it comes to the types of nut and bolts, I am always confused with
toggle pads. If you need to clamp un evenor angled surfaces tgether, the Toggle pads is the way to go. It has a 10% swivel rotation and it is self-aligning against the other workpiece surface. The grip with a Serrated Toggle pads is more robust and and you can choose between steel or stainless steel materials for whatever you want to clamp to.