More Information: https://www.allfasteners.com.au/produ... A drop-in anchor is a female concrete anchor, that is set by a specialist setting tool. Refer to our instructional blog at www.allfasteners.com.au/dropin for spacing requirements. If you have any enquiries about the application of drop-in anchors for your project, get in touch with us via our website. Allfasteners, For All Things Fixings.