STX Lacrosse Hammer 500 Head (Unstrung) Enhanced groundball play with STXs new, patent pending, Speed Scoop, allows for quick and effortless scooping by minimizing scoop drag on turf and grass Iconic Hammer three-sidewall brace design has been refined to deliver more stiffness and stability C-Channel technology distributes stress and impacts on the sidewall, providing extra strength when checking and stability on groundballs New head design removes excess weight from the previous Hammer model, while improving durability and stiffness Meets NCAA and NFHS rules