Patented design and ultra-tuff polypropylene makes these ball valve lockouts the best your money can buy * For use on ball valve sizes from 0.5" to 2.5" * Small lockout locks out pipes 1/2" to 2 1/2" in diameter * The small lockout can also be used to lock valves open on pipes from 1/2" to 1 1/4" in diameter * Outside Pipe Diameter 1/2" - 2 1/2"