The STX Hammer 500 Enduraform Lax head features EnduraForm™, a new, proprietary formulation for improved toughness in a wider variety of weather conditions. Further features include, Advanced engineering for improved shape retention, stiffness, and stability. C-channel for strength & stability, optimized three-strut design for stiffness & stability, optimal pinch for catching ability, pass deflection, and ball control, and a strike plate on sidewall for additional impact areas when throwing checks.