Using this JAKEMY 83 - in - 1 screwdriver set is easy. First, identify the type of screw you need to work on, then pick the right screwdriver bit from the set. Simply insert the bit into the driver handle and start turning. When using it on delicate devices like mobile phones or watches, be gentle to avoid damaging the parts. After use, make sure to clean the screwdriver bits with a dry cloth to remove any dust or debris. Store the set in a dry place to prevent rusting. If a bit gets stuck, don't force it; try to wiggle it gently to remove it. With proper care, this set will serve you well for a long time.