pneumatic tools and accessories is mainly the use of compressed air driven pneumatic motor and the external output of kinetic energy work of a tool, according to its basic work can be divided into: 1) rotary (eccentric movable blade type). 2) reciprocating type (volume piston type) general pneumatic tools mainly by the power output part, work form transformation part, into the exhaust road part, operation open and stop control part, the main part of the tool shell, of course, the operation of pneumatic tools must also have energy supply part, air filtration and air pressure adjustment part and tool accessories, etc.