The Stanley Fatmax 10-piece Cr-V screwdriver bit set contains various PZ profiles to suit different screwdriving needs. The set includes 2 pieces PZ1, 5 pieces PZ2 and 3 pieces PZ3, providing a wide range for professional and amateur use. The bits are made of chrome-vanadium steel (Cr-V), which guarantees high wear resistance and durability, making them ideal for intensive and durable use. This set is a practical and efficient choice for any job that requires precise and efficient work.