Professional Step Drill Bit 4-20mm Step Drill Bit

Professional quality, for daily use in a workshop

4-20mm step drill bit

Step drill bit manufactured with 2mm increments, perfect for drilling steel, brass, copper, aluminum, wood and plastics.
65.5mm long and made from high quality high speed steel, properly hardened for longer life.
Drilling steps marked in graduations: 4, 6, 8, 10, 12, 14, 16, 18, 20 mm.
Perfect for industrial situations and construction work.