Each set will include 12 Clip Back Heavy Levers and 12 Lugs. Lugs are Brass and Nickel Silver.To create your earrings solder or glue your design to the lug, then attach the lever to the lug, and pinch the lug to secure the lever.Choose from 2 metals: 265-22 Nickel Silver 266-22 Brass Sold in packs of 12