Power-Stud®+ SD1 Tie Wire Wedge Expansion Anchor Print The Power-Stud+ SD1 tie-wire anchor is a wedge expansion anchor which is designed for consistent performance in uncracked concrete. Suitable base materials include normal-weight concrete, sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry. The anchor is manufactured with a zinc plated carbon steel body and expansion clip for premium performance. This version of the Power-Stud+ SD1 anchor has a tie-wire head. Read Less