Function: This manual reversible impact screwdrivers set loosens rusted or frozen screws and nuts without damaging them, so you can save yourself the hassle of having to drill and tap stubborn fasteners. Impact Screwdriver Bits Included: Phillips bits #1, #2, #3(80 mm Long) and Phillips bits #3(35 mm Standard). Slotted – 8mm(35 mm standard), Slotted- 9mm(80 mm Long). It's an essential tool in your toolbox to help you save time and improve work efficiency. Manual Impact Driver Set: Detachable 1/2-Inch Square Drive can be used with bits and sockets. Note: Socket NOT Included. Easy and safe to use, made of high hardness steel with contoured grip, stable and durable. Forward & Reverse Drive Direction: The Impact Screwdriver is suitable for remove stubborn screws, automobile parts, rusty screws etc.Ideal to loosen screws or nuts that are rusted or over tightened.The triangle icon point to “L” for the loose screw, point to “R” for the tight screw. How It Works: When you strike the top of the tool with a hammer, the drive tang is turned 20 degrees in the direction you have set the tool. You can use this driver with impact sockets and on nuts, bolts, and other fasteners., Manufacturer: MAXPOWER