The ToughBuilt 24-bit Precision Multi-Bit Driver + Case set includes a professional-grade precision-machined aluminum driver and 24 bits for the most common precision fasteners. Each bit is black chrome-plated for rust resistance. The magnetized tip holds the fastener securely in place and prevents it from dropping. The ball-bearing spinning endcap ensures enhanced control and smooth operation. A knurled pattern on the handle provides a comfortable, controllable non-slip grip. The spring-loaded protective case is easily accessible with a button push and has magnetic bit cradles.