Powers Fastening Innovations 06206 Drop-Ins 3/8-Inch Internal Thread Type 304 Stainless Steel Drop In Expansion Anchor， 50 Per Box<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>All-steel， machine bolt anchor</li><li>Can be used in solid concrete， hard stone and solid block</li><li>Powers Fastening Innovations</li></ul></div><img src="http://ecx.images-amazon.com/images/I/312tcqFKtwL.jpg" noproxy>