FEATURES: Train staying down, fielding the ball with two hands, and quick transfer from glove to hand for proper fielding mechanics Forces your glove to stay open when attacking ground balls Simulate game-like situations during practice reps with design that is compatible with real gloves Creates a personalized fit with moldable composite design and can be re-molded for continued use Durable and lightweight construction ADDITIONAL DETAILS: Fits left and right gloves for baseball and softball To ensure a proper fit your glove wrist closure needs to be wide enough to fit the widest point of the insert which measures 5"