The guhring no 651 series hss tin twist drill bit is a professional grade jobber drill engineered for demanding metalworking applications. This straight shank metric drill features a titanium nitride coating that significantly enhances performance and extends tool life when working with challenging materials. Ideal for drilling steel and cast steel, alloyed and unalloyed grey cast iron, spheroidal iron, sintered powder metal, german silver and graphite, this drill delivers consistent, reliable results in professional workshop and fabrication environments. The high speed steel construction provides exceptional rigidity, whilst the tin coating offers superior heat and wear resistance for extended service life. Features and benefits bull high speed steel construction for improved rigidity and durability bull tin coating for enhanced heat and wear resistance bull straight shank jobber drill design for versatile applications bull suitable for multiple materials including steel, cast iron and sintered metals specifications diameter 7mm