Made with hard plastic, this box comes with 4 screws and a removable bottom piece. Smooth plastic surface ready for stickers! It is super easy to drill and the dimensions are 4.25″ X 3.13″ X 1.50″ Synthrotek kits that will fit in this case: 4093 Nand Synth (tight fit), Atari Punk Console, Clock Capture Module, Dev Board Delay, Passive Ring Modulator, Optical Theremin, Audio Amplifier.
Tip: the best way to get a project in a small case is to plan out the wiring before soldering
The Nand Synth will fit in this case, but it takes a little patience and planning. The other kits listed above will fit quite nicely.