Using the Bosch RCSS2164 rebar cutter is easy. First, make sure your drill is a standard three - jaw chuck drill and set it to rotation mode. Never use it in hammer mode as it can damage the bit. Insert the straight shank of the bit into the drill chuck. When drilling, the unique flute geometry will quickly clear away debris, and the relief hole will dissipate heat and help remove slugs. For maintenance, after each use, wipe the bit clean to remove any debris. Store it in a dry place to prevent rust. If the bit becomes dull, it might be time to replace it. With its high - quality carbide construction, it should last a long time if used correctly.