1.This M6 wood insert has a built-in thread, which can effectively prevent the screw from loosening. 2.This M6 threaded socket is made of zinc alloy, it is hard and strong and will not rust, also can be used in humid environment to prevent corrosion. 3.Wood threaded inserts can be used in the manufacturing or assembly of all kinds of wooden furniture, with a wide range of applications. 4.Easy to Use: This threaded insert's hexagonal shape and internal and external thread design make it a more convenient tool to use.Just drill a suitable size hole, then put in nut and tighten it, and you can easily assemble what you need. 5.Multi-use: The threaded socket is suitable for hardwood, solid wood, plywood, fiberboard, etc.You can use it to assemble your cabinets, beds and other furniture, all brilliantly.And the pack of 100 m6 screw inserts will fully meet your needs.