E-Z Lok Threaded Insert， 18-8 Stainless Steel， Helical， M3-0.5 Internal Threads， 6mm Length (Pack of 10)<img src="http://ecx.images-amazon.com/images/I/51C6BW47avL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41c%2BNM4sjnL.jpg" noproxy>