• Three high-speed HSS 4341 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.
• Model No. AK4746