The Werner A510000 reusable concrete anchor is a lightweight, easy-to-use bolt providing convenient anchorage in concrete. The anchor requires a pre-drilled hole of 3/4 in and 3-1/2 in minimum depth in 3000 psi concrete. It can be used in any direction as a fall protection anchor and is reusable with its easy to insert and remove design. Lightweight design is easy-to-insert and remove. Drill hole of 3/4 in with 3 in minimum depth. Minimum 3000 psi concrete. Multi-directional use.