On the left a clamp for any degree of corner (90 degree Shown) can be achieved by: make a stop cut for the desired angle in the throat, glue the jaws together and split the grain at the desired angle. Find and use the straightest grain possible for accuracy!
In the center- if all you need is to hold a 90 degree corner, glue a chunk of square scrap to a pair of clothes pins while they are attached to a good corner.
On the right, to hold each piece of an intersection is jus a bit more difficult. Remove the center section from one side of the jaw as marked, relive the diagonal marking to receive the spring arm from the other pin (if necessary). Then glue together on one side only as marked in red.
Don't forget a good coat of wax so the clamp dosent become attached to your part.
