General description High-speed HSS 4341 double spiral flute step drill bit designed for efficient swarf clearance and clog-free precision drilling. This versatile tool allows for the creation of ten different size holes ranging from 4mm to 22mm in 2mm increments, all with a single bit. It is supplied in a durable plastic storage case for easy transport and organization. Technical specifications Material: High-speed HSS 4341 Hole Sizes: 4-22mm in 2mm increments Model No.: AK4747 EAN: 5054511002638 Other information