The Simpson Strong-Tie® EZAC easy-set anchor is a pin-drive expansion anchor for medium- and heavy-duty fastening applications into concrete. The EZAC anchor provides holding power in concrete base materials including both concrete masonry unit (CMU) and brick. The anchor includes an integrated nut and washer for easy installation. Easy-Set 1/2 in. x 6 in. Pin-Drive Expansion Anchor (25-Qty) (Pack of 100).