- Can store the keys in two configurations, either with the base at the bottom and the keys sitting on their ball ends like a tree, or with the base pulled up snug to the bend if it’s going to be jostled around.
- Metric holder stores standard 9 sizes, inch holder stores standard 13 sizes.
Each set has option chrome hex keys. Sizes are engraved on each key except for the two smallest sizes (.050 and 1/16 for inch, 1.5 and 2 mm for metric)