Developed for heavy-duty screwdriving work and precise drilling in various materials. Do you need a set of robust screwdriver bits and multi-material drill bits to complete your interior work? Then the PRO Impact Mixed Set is the right choice. The screwdriver bits are made of modified steel for greater stability. The laser markings allow you to select the bit you need in no time at all. We have also used the same modified steel to make the drill bits and fitted them with carbide tips so you can drill new holes with ease. The PRO Impact Mixed Set is a great choice for interior fitters and plumbers who need reliable screwdriver bits and drill bits. The screwdriver bits have a torsion zone, torque loads are absorbed at the tip of the bits to ensure they do not break. The bits have colour-coded rings to indicate the head type and laser markings to help you choose. The HEX-9 Multi Construction drill bits have hard-wearing cutting edges and carbide tips for extra hardness. Their spirals on the drill bit efficiently remove chips and thus extend the service life of the drill bits. The set is housed in a sturdy case and arranged in holders that allow you to create your own toolbox. Impact-resistant 1/4 inch hexagonal shank for use with impact wrenches and drill drivers.