The Beadsmith Magic Tray (Crystal FX Magical Tray) Perfect for smaller stones (up to ss12!) With just a shake, flat back stones will turn right side up, quickly and easily! The textured surface design of the tray uses friction to flip your stones just like magic (or science)! They'll turn flat side down ready to be picked up by an applicator or tweezers and put into place, saving you time and aggravation. Designed for use with flat back stones. Simply place a small amount of stones in the tray then shake gently in a circular motion until the stones begin to turn over. Repeat. They are particularly recommended for silver-foiled glue-on stones. If using them for hot-fix (pre-glued backs) those items have a tendency to want to hold on to the surface! For the hotfix flatbacks we'd recommed our aluminium trays. The manufacturer does not recommend this tray for acrylic (plastic) stones - we do not sell acrylic stones. Triangle 3x3x3 inches