What is this?The frame adopts a simple and stylish geometric shape design. You can use this open-back frame to make kinds of resin crafts, DIY art, small charms, decoration pendants, pressed flowers, mini photo frames, key chains...What will I get?Shape: Heart ShapeColor: Silver Tone, Gold Tone, BronzeMaterial: AlloyOverall Size: 34mmx30mmx4mm / 1.34"x1.18"x0.16" (L*W*T)Hole Diameter: 2.5mm / 0.1"Package Content: 1Set x Pendant (3 Colors, 20 Piece of Each Color)Are there any advantages of the product?Made of metal alloy material with smooth surface, compact, portable durable and not easy to deform. The top of the pendants is designed with a small hole for easy hanging.How to use it?Easy to use, just fill the frame with resin, mini charms and so on.