Sand Casting Box Stabalizer

I have no idea what this is really called but its to secure the 2 halfs of a sand casting mold frame together for casting metal parts. The smaller holes(1/8") are for screws to screw into the frame and the bigger hole is for a 5/16" rod to be pushed through to temporarily keep the 2 halfs from getting out of alignment. You print 4 and put 2 on opposite sides on both halves.