Professional step drill set for commercial or occasional use 1/8” – 1-3/8” step drillsImperial sized step drill set5pc step drill setA set of 5 different step drills, stepped cone cuttersStep drills offer a significant advantage over cone drills because they offer a positive stop when a hole reaches a certain sizeCuts a perfectly round hole in sheet metalSaves time as you don’t have to keep changing the dill size for a larger hole to be drilledWorks perfectly on drilling holes in a number of materials including steel, copper, aluminium, plastic etc... Self – starting penetrate, no working and no pilot drill requiredManufactured from HSS for maximum strength and durability12mm flat shanks so suitable for use in most drilling machines, whether, electric, battery or airDouble flutes make a perfectly round hole and automatically deburr as you drillFor complete performance each time please ensure that the drills are well lubricated, especially when drilling aluminiumHRC 62 DrillsSelf starting designSET INCLUDES THE FOLLOWING SIZE DRILLS• DRILL 1 STEPS – 3/16”, 1/4", 5/16”, 3/8”, 7/16” and 1/2"• DRILL 2 STEPS – 1/8”, 5/32”, 3/16”, 7/32”, 1/4", 9/32”, 5/16”, 11/32”, 3/8”, 13/32”, 7/16”, 15/32” and 1/2"• DRILL 3 STEPS – 1/4", 5/16”, 3/8”, 7/16”, 1/2", 9/16”, 5/8”, 11/16” and 3/4"• DRILL 4 STEPS – 1/4”, 3/8”, 1/2", 5/8”, 3/4", 7/8”, 1”, 1-1/8”, 1-1/4” and 1-3/8”• DRILL 5 STEPS – 1/4", 5/16”, 3/8”, 7/16”, 1/2", 9/16”, 5/8”, 11/16”, 3/4", 13/16” and 7/8”Comes in metal tin for easy storage and transportation