For those who may be unfamiliar with fasteners such as these, here is a video which explains their general application/function: https://www.youtube.com/watch?v=4e9dQO8bLmI
Note that the example demonstrated in this video, is MUCH smaller than the ones offered here; although the principle of operation is the same.
These are the BIG BOYS; which use a 1" Bolt/Fastener, and which require a 1 5/8" drill size/drilled hole in the concrete/brick to which the expansion shield is then set.
If you are reading these words, the shields are available.
Correspond by CL email, can meet within a couple miles of Woodstock, GA, by appointment.