I picked up a couple of these to incorporate as hold-downs on a table saw sled I built.  They are working very well for the task and just have them attached using #8 x 3/4" wood screws.  The holes on the base are two large to use #6 screws (just an FYI).  There are multiple points of adjustment on these so they offer quite a bit of flexibility.  They do tend to be a little stiff out of the box, but I suspect they will loosen up a little with some lubrication and use.  So if you need a couple of toggle clamps for a saw sled and are intimidated by the multitude of options from a place like McMaster-Carr, just get a couple of these.  They are flexible enough to meet most needs.