This Interchangeable Push Down Tool is an easy way to set any 6mm, 8.5mm, 10mm, 11mm, or 12 mm stones into our empty cup chain settings or jewelry settings! There is no more need for several different tools, which saves space and money! Simply screw the desired size tip onto the screwdriver and push down the prongs over the rhinestone. No more setting each prong by hand. This tool will set all four prongs at the same time. Save up to 2/3's of the time setting stones. All prongs are set perfectly even with this tool!