This organizer holds 4 sets of 12 hex bits. 3 rows are .875" deep for extended length bits, and 1 row is .375" deep for shorter bits. Two model versions are available, with and without labels. I chose to fill them with the following bit sets from Amazon:
https://www.amazon.com/dp/B07VH7ZQGC
https://www.amazon.com/dp/B081M6MZQK
The author marked this model as their own original creation.