【Application】: Suitable for pine softwood, plywood, fiberboard, etc., it has a good effect in furniture combination. 【Durable material】: Made of high quality zinc alloy for durability and rust protection. 【Package includes 7 sizes】: 7 sizes include 5pcs M1020, 10pcs M820, 10pcs M815, 15pcs M615, 25pcs M610 , 35pcs M510, 30pcs M4*10, 130pcs in total. 【High Precision】: 130pcs High Precision 7 Size Hex Flange Threaded Insert Nut Assortment Kit. 【Easy to Install】: Just drill the appropriate size hole and install with a hex wrench, it makes the tapered outer wires difficult to pull out due to vibration.