Using this Wera T-handle TORX tool is easy. First, select the right bit for the screw you're working on. Then, firmly insert the bit into the screw head. For normal tightening or loosening, hold the T-handle with your whole hand and turn it. If you need extra torque, use the long arm for leverage. When you're done, just pull the bit out of the screw. Keep in mind to always match the bit size and profile correctly with the screw to avoid damaging either the tool or the screw. To maintain this tool, store it in a dry place. If it gets dirty, you can clean it with a soft cloth. The special surface treatment on the blades provides good corrosion protection, but it's still a good idea to keep it away from damp environments.