http://www.harborfreight.com/4-in-ra...der-62242.html
These are on sale at harbor freight right ( tool store) now for 1.99.
For sandwiching a quilt on a table for basting most people use large binder clips.
My husband suggested these ( he had some in his shed) because you can adjust them
a great deal for size.
I was thinking about going to get some of them. I tried one out on my table and they hold very securely and lock and unlock.
What do you think?