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Warning! Always unplug the unit when changing bits. Warning! After drilling or driving screws, the bit will be extremely hot. Do not touch it until it has had ample time to cool down. 1. Insert the Chuck Key (41) into one of the holes in the Chuck (3) and turn it counterclockwise to open the jaws. 2. Insert the bit and hand tighten it, then tighten it with the Chuck Key (41) by turning it clockwise. Carbon Brush (also found on bottom of tool) Torque Switch Figure 1 Trigger Chuck Lock Button Side