Simpson Strong Tie Titen HD Concrete Screw Anchors. What makes the Simpson Strong Tie HD concrete screws so popular? Contractors like them for there easy install. Engineers love them for their performance even in cracked concrete. Simply drill the appropriate sizes hole a half inch deeper than desired embedment and drive in. While an impact wrench makes the job easy, it is not recommended when tightening to block. We carry a large stock of most size of the Simpson Strong Tie Titen Concrete anchors. Available in zinc, mechanically galvanized and stainless steel. If you don't see the size or finish you are looking for, give us a call, we have it.