The patented cvx ball mark repair tool utilizes a 19 angle and Convex curve to promote the correct forward motion to properly repair ball marks (us patents 7, 611, 426: D637, 677 and other patents pending). the cvx ball mark repair tool is ergonomically designed with custom contoured rails for comfortable finger placement, and a textured indent for secure thumb placement. The magnetic front holds your ball marker in place. The set includes two iron stamped ball markers embellished with team trademark. Packaged in hangable clamshell.