With the International Tools eco 11.413 hss metal drill bit, you can easily drill 15.5 mm holes using a standard 13 mm drill chuck. Thanks to the reduced 13 mm shank, there is no need for specialized heavy machines or adapters to drill large diameters in metal and steel. The roll-forged hss construction provides dependable wear resistance, while the two cutting edges and 120 mm flute length ensure smooth, rapid chip removal. Featuring a total length of 178 mm, this twist drill bit gives you the control and precision needed for demanding workshop and maintenance tasks.