STEP DRILL BIT SHEET METAL PUNCH SETProduct FeaturesGraduated drill bit set made of 3 pieces of high-speed steel.Cutting without cracking thanks to the double flute system.Small Drill: 4, 6, 8, 10, 12 mmMedium Drill: 4, 6, 8, 10, 12, 14, 16, 18, 20 mmLarge Drill: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 mmGalvanized coating that is 6 times more durable than regular HSS bits.Package Includes1 piece of step drill bit sheet metal punch set