Using this Wera bit assortment is easy. First, select the right bit for your job from the organized Bit - Check. Then, attach it to the ratchet. The thumbwheel on the ratchet allows you to turn the bit smoothly and quickly. When using the ratchet, don't apply more force than the 65 Nm it can handle to avoid damage. As for maintenance, keep the bits clean after each use. You can wipe them with a dry cloth. Store the set in a dry place to prevent rusting. And always make sure the Bit - Check keeps the bits in place to avoid losing them.