1/2 inch Impact Driver Wrench. Manufactured from Chrome Vanadium Steel with a satin polished finish. knurled rings around the circumference of the body for use in oily conditions. To use simply tap tail of handle with a hammer, turn head to tighten and loosen the screw. Ideal for the removal of rusty corroded or tight fitting screws that have been tightened past the recommended torque. If you remove the fixation cover, this impact driver can be used for 12.7 angle hole. Features: 1/2 Reversible Impact Driver (clock and anticlockwise). Removable 1/2 Socket. Chrome Vanadium Steel. Knurled rings for use in oily conditions. Contents: 3 x (36mm long) Phillips bits: No's 2, 3 and 4. 3 x (36mm long) Slotted bits: 6, 8 and 10mm. 2 x (80mm long) Phillips bits: No's 2 and 3. 2 x (80mm long) Slotted bits: 8mm and 10mm. Supplied in a blow moulded storage case.