DEXTER PRO drill bit set hex shank Ø2-8 mm, 6 piecesThis set of 6 metal drill bits is ideal for efficient drilling of hard metals and technical steels such as stainless steel. To avoid premature wear of the metal drill bit, we recommend pre-drilling, that is, drilling an initial small diameter hole before using the desired final diameter. The larger the diameter of the hole, the greater the number of pre-drilled holes (e.g.: 3 / 6 / 9 / 12).Optimized packaging: this product allows for increased transportation efficiency, helping to decrease the impact on the environment.