1、18pcs/Set of impact driver set, ideal for the removal of corroded screws and bolts. 2、Simple to use, just hit the end with a hammer, causing the end to spin around and undo / tighten the screws / bits, etc. 3、Made of chrome vanadium steel for high strength and maximum durability. 4、1/2in drive so as well as the bits / adapter provided it will also fit any 1/2in drive sockets, etc. 5、Reversible action to fasten or undo, offering you much convenience. 6、Knurled handle for extra grip in oily conditions. Plastic blow-molded carrying case for easy storage. 18Pcs/Set x Impact Screw Driver  Item Type: Impact Screw Driver Kit Condition: Brand NewMaterial: Chrome Vanadium SteelColor: As pictures shownTotal Length of Impact Drive: Approx.170mm/ 6.69inApplication: Suitable for the Removal of Corroded Screws and BoltsSet Including:1 x Impact Driver 4 x 70mm Impact Driver Bits - Slotted 8mm, Slotted 10mm, Cross Screwdriver #2 and Cross Screwdriver #3 13 x 36mm impact driver bits - Cross Screwdriver - ‘1, #2, #3, # 4. Hex Bits 5mm, 6mm, 8mm and 10mm. Slotted 5.5mm, 6.5mm, 8mm, 10mm, 12mm