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This impact screwdriver set includes an impact driver with a 1/2" Sq. Dr. end and a range of 8mm hex screwdriver bits. Ideal for removing over tightened or seized screws. Equipped with a heavy-duty internal mechanism, the driver is designed for sustaining impact from a mallet. It has a blackened finish for corrosion protection. The durable impact absorbing handle is knurled to provide extra grip. Overall tool length 162mm. The screwdriver bits are made from chrome vanadium steel.