Ideal for professional contractors, workshop technicians, and DIYer enthusiasts requiring tool for heavy duty construction projects or frequent home appliance repairs The 5mm / 6mm round shank electric screwdriver bits feature instantly retention and crosses compatibles PH0 PH1 PH2 sizing, for rapid bit changes in high torqued drilling applications Perfectly grips fasteners during overhead installations, wall assemblies, or furniture building where screw stability matters in tight spaces or vertical surfaces Compatibles with 801 / 802 shank systems, this 10 piece set eliminates tool juggling with universals fit for cordless drills, impacts driver, and manual screwdrivers across woodworking / metalworking scenarios Engineered with high grade hardened alloy steel, these screwdriver bits withstand multiple concrete screw tests while slippage with builts in strong magnetism for precisions tasks, Manufacturer: GinMimi