It would appear at first glance that positioning a fastener and then casting concrete around it should be the easiest way to install an anchor. There are no holes to drill, no carbide bits to break, and no extra labor to hire: just set the anchor into the form and place the concrete. Regrettably, first glances, like first impressions, are often misleading. For the simple truth is that cast-in-place anchors may be quite complicated and among the most expensive anchors in true installed cost. One alternative is the true drop-in concrete anchor. By definition, this is an anchor in which the bolt diameter is equal to the diameter of the installation hole. This is a significant difference from other concrete anchors that are set in a drilled hole, in that a true drop-in requires the minimum amount of concrete removal. Installation time is consequently faster, and the snug fit of the bolt in the hole over its total length provides additional strength. The true drop-in anchor eliminates completely one of the positioning steps required with cast-in-place fasteners, namely the careful positioning check after the concrete has set to see if the anchor is really where it should be. A true drop-in anchor consists of a bolt threaded at one end, with a parabolic configuration at the other end. A one piece, wrap-around clip rides on the parabolic-shaped end and is prevented from falling off by an upper and lower shoulder on the bolt. A nut and washer are also provided. After the anchor is tapped in place, the washer and nut are added, and torque is applied to the nut. The clip bears against the hole surface which prevents it from spinning and also acts as a positioning aid. As torque is applied the clip engages the concrete with ever increasing angularity, and is locked by the upward action of the parabolic section.