Using this standoff kit is easy. First, pick the right place on your circuit board, sensor, or mechanical structure to install the standoffs. Then, insert the standoff into the pre - drilled hole. Next, use the provided M3 * 6mm screws and M3 nuts to secure the standoff firmly. This is especially useful when building a multi - level robot chassis. When handling the kit, be careful not to lose the small screws and nuts. Keep them in a safe place. For maintenance, you can clean the standoffs with a dry cloth to remove dust. If they get dirty, you can use a mild cleaner. Make sure to dry them thoroughly before reusing.