Description: An impact driver is a manual tool that delivers a strong, sudden rotational and downward force. In conjunction with toughened screwdriver bits and sockets they are often used by hitting a hammer onto the driver to loosen larger screws (bolts) and nuts that are corrosively "frozen", rusted or over-torqued. The direction can also be reversed for situations where screws have to be tightened with torque greater than a screwdriver can reasonably provide. Features: Chrome vanadium steel bits Knurled, chrome plated handle Ideal to loose screws or nuts that are rusted or over-tightened Reversible to firmly tighten screws Comes in storage case Package Included: 13pcs Impact Driver Socket Set 1 x Metal Case