The Kerf saw blade organizer will hold all your jeweler's saw blades, it has 16 compartments that are labeled with the size of the blades, from 8/0 all the way to #8. 8/0, 7/0, 6/0, 5/0, 4/0, 3/0, 2/0, 1/0, 1, 2, 3, 4, 5, 6, 7, 8. It also has one compartment labeled as “Wax Blades or Mixed Blades” for when you find that single blade and do not know what size it is! The last compartment is to close the container and have all the blades safe and secure. The opening on the side of the container is to allow the user to see if there are any jewelry saw blades inside the compartment. The first set number is the blade size, the second is the thickness in millimeters, third is the suggested gauge you should use with that blade size, and last is the drill size (DS) to be used if needed.