Using any SnapSetter tool base or adapter, begin setting the snap, but hammer only once to set the snap loosely on the fabric. Disassemble the SnapSetter, reposition the fabric back onto the SnapSetter base and place the Middle Positioning bar over the post outward away from the tool base. Then, add the tool top. The only two SnapSetter pieces touching the snap should the tool top and base allowing the bulky layers of the fabric to not interfere with the snapping process. Hammer the tool twice more to se the snap tightly onto the fabric.