Used by top professional and amateur players around the world. This chalk is a Longoni secret formula created over 30 years ago that is just now being discovered by players in North America. This chalk sticks like a magnet to cue tips, even on hard to hold chalk tips like Phenolic, and will cure most of all your miscue problems, allowing you to get more English on the cue ball to make that hard, game winning shot! Another great feature of this amazing chalk is the dramatic chalk use reduction due to its fine texture.