There are three kinds of throat hoops: British, American and German.

English throat hoop: the material is galvanized iron surface, commonly known as galvanized iron, moderate torque, cheap and wide range of application;

German-style throat hoop: the material is galvanized iron surface, the buckle distance is large stamping forming torque, the price is moderate and high, restricted by the high cost of the production link, low market share;

American throat hoop: divided into iron galvanized and stainless steel two main difference is the buckle distance for perforated (that is, through the eye buckle) on the market to stainless steel material, mainly used for auto parts, holding rods and other high-end market price is higher than the other two.