Step drill bits high speed steel. Century step drills are for cutting in ferrous and non-ferrous metals, plastics and wood up to 1/8 thick. Double flute design reduces chatter and deburrs holes. Zirconium coating reducers ware for a longer tool life. Product Features:High speed step drill for drilling and deburring holes in ferrous and non-ferrous metals plastics and wood up to 1/8-Inch thick Double flute design reduces chatter and deburrs holesZirconium coating reduces wear for a longer tool life13 steps in 1/16-inch increments #1Size 1/8-Inch to 1/2-Inch
