All the critical hex keys you need to work on your marker, in a high-contrast, robust holder that is easy to find in your bag or on the ground if you drop it. Includes: 1/4", 7/32", 3/16", 5/32", 9/64", 1/8", 7/64", 3/32", 5/64", 1/16", 0.050" Bright holder makes it easy to find in your bag or on the ground / in the pits