This is a print-in-place box for a digital caliper + compartment for the corresponding batteries size 303/357 and space for storing small items (or in my case more tools) It is best to measure the hole for the battery and adjust it if necessary before you can no longer get the battery out I can only recommend gluing foam into the lid to prevent the caliper from slipping or rattling An AMS would have been great with this project too :)