Head Type = Tamper Resistant Hex Head Type = Impact Drill Bit Set Quantity = 10 Material = Chrome Steel Molybdenum Vanadium Typical Applications: This screwdriver bit set is typically used by professional tradesmen, technicians or DIY enthusiasts. A set of screwdriver bits is one of the most important hand tools in any technician's toolbox. In many situations and professions, screwdriver bits are essential for completing specific tasks when loosening and tightening fasteners. The most common types of screwdriver bits, such as flat head or Phillips bits, are suitable for a very wide range of applications. They are mainly used in the following applications: Mechanical manufacturing and industrial carpentry/joinery Fastening wood to metal. Automotive applications. Professional screwdriver bits such as TORX, hexagon.