Numbered and Lettered!
Titanium coated High speed steel set in metal tin.

A/F sizes: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4, 17/64, 9/32, 19/64, 5/16, 21/64, 11/32, 23/64, 3/8, 25/64, 13/32, 27/64, 7/16, 29/64, 15/32, 31/64, 1/2"

60 Number sizes: 1, 1.025, 1.05, 1.075, 1.163, 1.3, 1.375, 1.49, 1.59, 1.68, 1.75, 1.83, 1.9, 1.96, 2.03, 2.05, 2.15, 2.23, 2.34, 2.40, 2.45, 2.49, 2.54, 2.6, 2.66, 2.75, 2.78, 2.83, 2.9, 3, 3.2, 3.4, 3.5, 3.6, 3.68, 3.74, 3.8, 3.85, 3.93, 3.98, 4.03, 4.15, 4.24, 4.33, 4.43, 4.5, 4.55, 4.63, 4.73, 4.78, 4.84, 4.9, 4.98, 5.03, 5.1, 5.14, 5.23, 5.33, 5.53, 5.7, 5.85, 5.95, 6.05, 6.15, 6.25, 6.43, 6.53, 6.65, 6.8, 6.93, 7.03, 7.25, 7.35, 7.55, 7.9, 8.08, 8.3, 8.48, 8.7, 8.95, 9.20, 9.43, 9.65, 9.93, 10.1, 10.33MM

All Letter sizes.