Turn your ordinary ball marker into a commemorative coin! Links Walker challenge coin features two removable, die-struck metal ball markers that are held onto the coin with a heavy-duty magnet. These challenge coins are extremely durable and will be the last ball markers you will ever have to buy. These coins sport an attractive colored outer ring that looks great while showing off your team spirit. Measurements for the challenge coin are 1.5" in diameter, 3/16th of inch thick (.15") and weight 0.8oz (with coins).