CTD Step Drill 3/16-7/8" Part # 01403 1/4" shank

Special Axial and Radiol flute design speed work piece penetratian. The 135'split point self centers and easily starts with no pilot hole required. Dual flute construction drills clean accurate holes in thin materials, quickly and easily.

Use for.all thin metals, rigid plastics, wood or composite materials with a thickness equal to or less than the step thickness. When drilling steel with 1/8" or greater thickness, a starter hole of the smallest step diameter will speed the drilling process.