The bosch pro 20 piece impact multiconstruction drill and screwdriver bit set is a versatile mixed bit set designed for heavy-duty screwdriving and precision drilling across a range of construction materials. Built for interior fitters and installers, the set combines impact-rated screwdriver bits with expert hex-9 multi construction drill bits to handle the demands of everyday fitting and installation work. The screwdriver bits are manufactured from heat-treated modified steel, providing excellent resistance to high torque, and feature an extended torsion zone that absorbs stress at the tip to prevent breakage under load. Colour-coded rings and laser markings make it easy to identify the correct bit quickly on site, reducing downtime. The expert hex-9 drill bits feature carbide tips and bosch centering geometry for accurate hole starts, while their fluted design removes chips efficiently to extend service life. All bits use a 1 4 impact-rated hex shank, making them compatible with both impact drivers and drill drivers. The full set is housed in a sturdy case with organised holders, allowing you to keep bits arranged as suits your workflow or integrate them into your existing toolbox setup. Features and benefits: extended torsion zone absorbs torque stress at the screwdriver bit tip, preventing breakage under high load heat-treated modified steel construction for strength and long-term durability carbide-tipped expert hex-9 drill bits with bosch centering geometry for acc...