Dual Magnetic chalk holder designed to clip to the bill of your cap, hat or visor, utilizing BRAND NEW DUAL MAGNET TECHNOLOGY. Strongest magnetic attraction on the market. Lightweight design makes this item ideal for use on the bill of your cap, hat or visor. Also, fits on your belt or pocket lining. Using a Neodymium Rare Earth Magnet produces a very strong magnetic attraction between the clip and chalk holder. Includes one clip, one full size chalk holder, one small chalk holder (for use when your chalk reduces in height due to use), one cap that fits over the chalk holder and one Neodymium Rare Earth Magnet. Fits Taom and other round chalks. Inside diameter is 25mm or 1" Full size chalk holder is 14.5 mm or 9/16" Small chalk holder is 9 mm or 11/32" HAND MADE IN THE USA