41-piece universal spiral drill bit set with diameters ranging from 6.0 to 10.0 mm in 0.1 mm increments. This set is characterized by high elasticity, making it very suitable for use in handheld drills. It is designed for machining both alloyed and unalloyed steel and requires minimal feed pressure even at larger diameters. The drill bits offer maximum toughness and optimal cutting performance. Due to the high elasticity, there is a low risk of breakage at smaller diameters. The optimized drilling geometry and special ALPEN grinding reduce drilling time by about one third. The tool life is extended through the use of high-quality HSS steel and a special heat treatment.