Key Features: The Simpson Strong-Tie tie-wire anchor is a wedge-style expansion anchor for use in normal-weight concrete or in concrete over steel deck. With a tri-segmented, dual-embossed clip, the tie-wire anchor is ideal for the installation of acoustic ceiling grid and is easily set with the claw of a hammer. Tie-Wire 1/4 in. x 1-1/4 in. Wedge Anchor (100-Qty) (Pack of 5).