Snow, also known as Sherry, is suitable for threaded rotary rod tips. Can avoid climbing staff walking rod tip not into the snow sand and other soft soil too deep, or stone gap. Helps walk to protect the rod rod. Suitable for carbon rod, aluminum alloy rod has versatility; the use of rubber primary recharge (rubber secondary or three-time return is very common, car tires are generally used for a single return), good durability.