Good Material, Made of metal and plastic parts.The item is compatible with Nintendo Switch Joy-con Controller.Replace your worn out, broken, damaged, old or lost sliding clasps.User Manual: 1. Use the Y screwdriver to open 4 screws. 2. With the and screwdriver, open the screw inside.3. Take the small iron.4. Take out the original lock buckle carefully.5. Insert the spring into the metal clasp.6. Insert the metal buckle into it and press the spring into the slot.7. Put the small iron and the screw back.4 Pairs totally. The left buckle is different from the right one. Be careful not to reverse them. Note: The data are all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.