A wonderful way to secure your fancy stone to your project! Simply place your fancy stone in the top and secure it with the 4 prongs, then you can sew through the holes on the back to securely attach your stone. Now you can have the sparkle and dazzle of the beautiful fancy stones on your clothing, horse tack, belts, handbags, hats, etc..... This set holds Swarovski 4928 12 mm.