I designed a Gridfinity bin to hold my Klein 3" magnetic nut drivers. I got tired of fishing around for them in my toolbox and always grabbed the wrong one. This way they're always at hand, I use them mostly for working on pinball machines. I added a cross-slot to put your fingers in to pick out the one you need. All the slots are designed around the 3/8" driver, so YMMV for any ones bigger than that, the driver socket may not fit. The smaller ones fit ok but because the shaft diameters are slightly smaller too, they wobble a little bit, so you can adapt the model if it bothers you. The handles are all the same size so they fit just fine.