Using the Wera 950 Hex - Plus L - Key Set is a breeze. Just pick the right size key according to the laser - engraved markings and insert it into the hexagonal socket screw. The ball - end on the long arm is great for those hard - to - reach spots. When storing, use the practical clip fastener to keep all keys together. Make sure to keep the keys dry to maintain the corrosion - resistant BlackLaser surface treatment. Avoid using excessive force as it may damage the keys or the screws. If the keys get dirty, simply wipe them clean with a dry cloth.