A drop-in anchor includes a tubular sleeve having a first end and an expandable second end, the sleeve including one or more indicator surfaces offset from the first end along a sleeve axis of the sleeve. A plug is insertable in the sleeve such that when the plug is driven into an installed position in the sleeve, the second end expands and an installation tool interacts with the first end to provide a visual indication, due to contrast in appearance with the one or more indicator surfaces, of engagement of the drop-in anchor to a workpiece.