Ok so somewhere , i heard about the idea of using a 3/4 bolt for a bench dog. Well i picked some up to try.
Attachment 48879 They have a nice thick hex head that will easily hold a piece of wood secure on your workbench.
Give it a try. By comparison to the cost of these or these its a huge saving. Only cost me $4.50
Still got to get the bench clear to drill the holes.