General description Sealey Spiral Flute HSS M2 Step Drill Bit Set includes three high-speed HSS M2 spiral flute step drills designed for efficient and clog-free precision drilling. This set allows for the creation of 18 different size holes using just three bits, making it a versatile addition to any toolkit. The drills are supplied in a convenient flip-up metal storage case. Technical specifications Model No.: AK4743 Size #1: Ø4-12mm Size #2: Ø4-22mm in 2mm increments Size #3: Ø4-30mm in 2mm increments EAN: 5054511002584 Other information