Good quality material: these threaded inserts are made of good quality zinc alloy, hard and durable Usage: pre-drill a proper hole, screw in with internal hex tool; Unique self-tapping designed external thread, contribute to tapping, with good tensile resistance, can effectively prevent stripped due to torsion or vibration Easy to install: simply drill an appropriately sized hole and install with hex key, tapered external threads makes it not easy to pull out caused by vibration Wide application: suit for soft woods such as pine, plywood, fiberboard, etc., have a good effect in the furniture combination Package include: 7 sizes include M410, M510, M610, M615,M815, M820, M10*25, total 100 pieces in a transparent box, can meet your different needs Quantity: 105 pieces Note: It does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual