Products are generally divided into the drill chuck wrench type, style and self-tightening type of manpower categories. With the development of the times, people pay more attention to the requirements of the tools easy to use, this type of manpower and self-tightening drill chuck is the development trend, development and production of our new direct manpower and self-tightening drill chuck series . We will drill chuck manpower into one type, style and quick-change type two, three. Meanwhile, in every type of general type and is divided into two self-locking.