Set your gemstones in bezel cups and cupchain settings with one squeeze of your hand. Parallel action applies even pressure to push down prongs evenly. Rapid action. Furnished with 5 brass setting heads (6.0, 8.5, 11, 12, & 14 mm dia.) and 2 plastic holding heads for setting 10, 12, & 14 mm round rivoli stones, 6, 8.5, & 11 mm (29, 39, & 47-48 ss) round chaton stones and 12 mm square stones. Made in Pakistan.