Pitcher's cover (for left-handed pitchers) Includes a large quantity of pins? nails? Selling as a set. P cover (cover for pitcher's spikes) When a pitcher throws, they drag the toe of their pivot foot (right foot for a right-handed pitcher) on the ground, causing the toe area of the spikes to wear out quickly. This is a reinforcement part to prevent that. Material: Generally made of leather or resin. Use: Reinforcement for the toe of baseball and softball pitcher's spikes.