Set of 12 interchangeable screwdriver blades including tx hex as well as phillips and pozidrive heads with chrome vanadium steel blades supplied in the unique teng tools tc tray with removable lid and dove tail joints for use on itrsquos own or as part of the teng tools tc control system all teng tools screwdrivers are designed to have a hole in the handle which can also be used for securing the tool with a fall protection wire if needed