Tip Drill Set, Size: 0.0225 - 0.0635 Inch Diameter, Carbon Steel, Drill Size: 74 - 52, Includes: (12) #74 - #52 High Carbon Steel Drills Drill size: 52; 54; 56; 58; 60; 62; 64; 66; 68; 70; 72; 74 Drill size: 0.0635 in; 0.055 in; 0.0465 in; 0.042 in; 0.04 in; 0.038 in; 0.036 in; 0.033 in; 0.031 in; 0.028 in; 0.025 in; 0.0225 in