This 0081500550100 Drill bit with Ø: 5.5mm and L: 160mm for concrete and metal, manufactured by Alpen-Maykestag, comes in a blister package. It features a high quality drill bit, capable of drilling into hard concrete surfaces, with an optimum drilling speed range between 3,000rpm to 4,000rpm with an optimal pressure of 20Nm. It includes a 135° point angle, a hexagon shank and a two flute design. Additionally, it boasts an effective cooling thanks to a spiral groove which ensures a sturdy and reliable performance.