5/64" Ball-point Hex Wrench. Interactive LED Panels and kits ship with 3/4" aluminum standoffs and stainless screws. You can use this wrench (An "Allen" wrench-- a little wisp of hexagonal steel wire) to tighten the screws if you like. It's hardened steel with a tough but clean gold-plated finish. You probably don't need one of these-- you can actually tighten the standoffs by hand without it. You can also get hex wrenches (for less) elsewhere. But these are really nice ones and we've been asked... so here they are.