tools holders (pliers & drillbits)

Those holders are designed for pliers and drill bits. You could use the last one for small screwdrivers or similar.

Cut in 3mm acrylic or modify the width of the slots to fit another size.

Use three 5mm (M5) threaded rod and 12 nuts to finish the holder and to make it stronger. If you keep some precision using the laser, it is possible to use only one of them or even none.