These have quite a bit of clamping pressure, considering their small size.  These are handy for holding plans or templates on a piece of plywood and other small, non-structural clamping jobs.  They are just about the right size to hold a month's worth of materials invoices together:-)  I have several of these clamps in different sizes that always give you that extra hand when you need it.  They also double as grip exercisers while you're watching HGTV.