These are two tool holders designed to be mounted on a standard optical bench (such as sold by Newport or Thor Labs) to hold small screwdrivers and Xcelite Hex Drivers. I used 1" diameter optical post(s) to mount it to the table at the height I needed. The rectangle version has three 1" spaced, counter-bored holes for 1/4-40 bolts for mounting. The round version has one centered counter-bored hole for a #8-32 bolt for mounting. The holes for the tools are only .150" in diameter, but if you print it at 50% fill or more, you can drill out the holes bigger to fit what you need easily. This is a pretty specific helper tool, but maybe someone else can find this useful.

Print it and bolt it to your table. Works best if it is mounted at least 1/2"-1" off the table with posts. Print it 50% fill or more and drill tool holder holes to your needs.