Gridfinity-Craftsman socket wrench holder (verified to work with models 24957 L-AB and 31415 L-AB). Size is 5x1, approx. 28 mm tall.
Compatible socket wrench holder for model 31415 L-AB
https://makerworld.com/en/models/428502#profileId-332658
Compatible socket wrench holder for model 24957 L-AB
https://makerworld.com/en/models/440466#profileId-346154