The Bosch PRO 20 Piece Impact Screwdriving and Multiconstruction Drilling Mixed Bit Set from ITS is a handy selection of impact rated screwdriver bits and useful drill bits. The screwdriver bits are made from modified steel for strength and added laser markings to help you pick out the bit you need. The same modified steel has been used to make the drill bits with carbide tips added to help you start new holes with ease. The PRO Impact Mixed Set is a great choice for interior fitters and installers who need reliable screwdriver bits and drill bits. The screwdriver bits feature a torsion zone, which absorbs the torque stress at the bits tip, making sure they wont break. The bits have colour-coded rings indicating the head type and laser markings helping you pick out the bit you need. The HEX-9 Multi Construction drill bits have hardwearing cutting edges and carbide tips for additional hardness. Their flutes remove chips efficiently, extending the drill bits lifetime. The set is housed in a sturdy case and arranged in holders you can use to build your own toolbox.