Very inexpensive pressed metal swing hook box clamp with screws.  Buy as many as you like for at a flat shipping rate.  I also sell a similar but better quality version of the same clasp in my store.

Notice this model does not have the same securing loop as the BAG clasps I offer.  This particular clasp is designed for a rigid hinged closure where each half of the project will not have lateral movement.  If working with clothing or leather projects my BAG closures may work better. 

If you have any questions about the product please ask, if you wish to see a gallery of my leather work please visit me at loveduckleather.com  to see more of my on-hand products please visit my ebay store.