sail wedge

I designed this at the request of a man with sail boat. The sail on his boat has rigid members (I don't know the terminology, so I just call them "spines") inserted in the sail to help it keep its shape. The spines are inserted into pockets in the sail, and a wedge is needed to close off the open end of the pocket so that the spines doesn't work themselves out of it.

He needed a few spares. The original has a clamp at the back end to hold a strap to keep the wedge from falling off if loose. The replacement I made has a hole at the back which serves the same purpose.