This product comes in a set of two. It can be used quickly without shaking, even by beginners, making it easy to climb with just one. Great for when your fingers are dry and slippery, or in dry winter conditions. Using it as a base before chalking up creates new friction. When used as a base, it's effective for those with sweaty hands or in humid conditions like the day after rain. When used alone, it doesn't produce any chalk dust.