Get a perfect flush joint every time with this Premium Face Clamp with 3-1/4" Reach (KHC-PREMIUM) from Kreg. It conveniently holds projects in place as you work and clamps with moderate pressure.  It's capable of a 3-1/4" reach and is easy to use: just place the large pad of the clamp directly over the center of the joint line on the face side of the workpiece (opposite the pocket holes), clamp with moderate pressure and drive a screw.