Beam block sheet holders

These handy, modular clips are designed to hold a sheet of metal or card in order to block any stray beams from your optical table - we used some nice corrugated, black-annodised aluminium. Being able to mix and match allows you to quickly drop in or remove sections of your beam block and split your table into sections without having to install large lengths of material or a gantry around the table. You could also use them as holders for alignment targets. These are designed for metric tables (the design captures an M6 caphead screw) but should also work with imperial tables (and 1/4"-20 caphead screws).