Features:100% Brand new,High quality with excellent customer serviceThe cross self-tapping screws does not need to be used with the nutsThe Tooth thread is self-tapping, and the triangular tooth self-extrusion screw at the end point is formed.When it is screwed into the hole of plastic metal,the wood or thin iron material, the internal thread is formed.Extrusion and the reliable locking thread connection is formed in the hole.