FIX-HPI3-5 is a five-piece high performance impact universal bit set. This set includes five commonly used multi-spline bit sizes, has a shank diameter of 5/16”, and includes a magnetically-housed bit holder. The bits range from P1, P2, P3, P4 to P5, providing maximum and general use coverage, making this set the perfect choice for drilling and driving screws into brick, composite, and hardwood surfaces. The bits are constructed out of durable alloy steel and chrome plated for a long working life. The set also includes a black plastic case to keep your bits organized and dust-free.