Using the Makita 196351 - 8 cartridge holder set is easy. First, make sure your cordless caulking gun is the compatible DCG180RFEB/ZB or from the Makita XGC01 Series. Then, assemble the included parts: the 300 ml holder, holder clamp ring, 300 ml piston, and push rod. Insert your 10 oz. or 300 ml cartridge into the 360° rotatable holder. When using, hold the caulking gun steadily and squeeze the trigger gently for an even application. As for maintenance, after each use, clean the parts with a dry cloth. Store the set in a cool, dry place. Avoid exposing it to extreme temperatures or moisture. If you notice any damage, stop using the set immediately and check for replacement parts.