Description: The expansion anchor is made from plastic, durable not easy to be cracked, and the screw pin is made from metal, not easy to rust. The screw pin has complete thread and deep screw, which can bear the strength evenly, you can use it without worries because it works with strong hardness. There are 2 types for choosing, including 2 shapes and 100pcs or 50pcs, meeting your different needs. When you tighten the screw, the expansion can expand to the 2 sides, which will not tighten the screw when drilling, preventing the anchor from rotating in the hole when installing. This kind of expansion is a good repair accessory for drywall, fiber board, hollow sheet, curtain, light, photo frame, ornament and decorations. Specification: Material: plastic, metal. Color: gray, white. Size: type 2: 36 x 20 x 15mm, outer diameter: about 13mm, drilling hole: about 8-10mm, suitable board thickness: about 8-15mm. Airplane: 30 x 20mm, outer diameter: about 50mm, drilling hole: about 8-9mm, suitable board thickness: about 8-15mm Note: Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow a slight deviation for the measurement data and make sure you do not mind before ordering. Package included: Type 1: 100x expansion anchors. Type 2: 50x expansion anchors. 50x pins.