Three high-speed HSS M2 double flute step drills. Double straight flutes for efficient swarf clearance.Allows clog-free, precision drilling of 18 different size holes with just three bits. Supplied in a flip-up metal case. Features: Three high-speed HSS M2 double flute step drills Double straight flutes for efficient swarf clearance Allows clog-free, precision drilling of 18 different size holes with just three bits Size #1: Ø4-12mm Size #2: Ø4-22mm in 2mm increments Size #3: Ø4-30mm in 2mm increments Supplied in flip-up metal case Specifications: Guarantee:Consumable Model Number: AK4733