Three high-speed HSS 4341 double spiral flute step drills. Double spiral flutes for efficient swarf clearance. Allows clog-free precision drilling of up to 18 different hole sizes. Supplied in flip-up metal case. Features & Benefits: • Three high-speed HSS 4341 double spiral flute step drills. • Double spiral flutes for efficient swarf clearance. • Allows clog-free precision drilling. • 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. AK4749 Specifications: Model No AK4749 Brand: Sealey Nett Weight: 0.49kg Size 1: Ø4, 5, 6, 7, 8, 9, 10, 11, 12mm Size 2: Ø4, 6, 8, 10, 12, 14, 16, 18, 20, 22mm Size 3: Ø4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30mm