Wedge-All® Wedge anchor. Made of carbon steel. Zinc plated finish. 1/4 inch drill bit diameter. 2-7/16 inch thread length. It is a non-bottom-bearing, wedge-style expansion anchor for use in solid concrete or grout-filled concrete masonry. Threaded studs are set by tightening the nut. One-piece, wrap-around clip that ensures uniform holding capacity that increases as tension is applied. Threaded end is chamfered for ease of starting nut. Most sizes feature full thread for added versatility.