Abstract: A connection fixed device for host and accessory of swing tools includes an output shaft in the host and a working head arranged at the top part thereof, characterized in that: a regular polygonal protruding block is arranged in an axis core of upper surface; a plurality of stoppers are arranged evenly along the circumferential direction of the top of a connector and regular polygonal slots corresponding to the protruding block in the bottom of the connector; the number of sides of said regular polygonal slots is great than or equal to that of the protruding block; said stopper of the working head, the protruding block and the connector are all matched. The protruding block of the utility model is designed in regular polygon which can be matched with most of working heads, even some have special shape of coupling holes, which can be coupled with the connector in advance and then with the output shift, it is very convenient to work.

Abstract: The utility invention discloses a quick-release type three-in-one pneumatic nailer, comprising a body, a handle, a magazine, a loading nails hole arranged on the right side of the magazine and a nailer head in front of the body, is characterized in that: a magazine guide bar fixing in the rear of the magazine, a magazine fixing plate is arranged in the higher part of the front side of the magazine; a snap pin is arranged in the nailer head matched with the magazine fixing plate; an angle adjusting block is fixed in the lower part of the handle; the angle adjusting block in provided with a plurality of slots matched with the magazine guide bar.

Abstract: A direction switching and speed controlling device for an air tool includes two holes provided respectively on two lateral sides of an air cylinder (2). Holes on one side are two air outlets (8), and two holes on another side are a forward rotation air inlet (13) and a reverse rotation air inlet (12). An air valve (7) has an indentation portion (9) provided on a lateral side thereof, the indentation portion (9) is engaged with teeth portion (10) provided on a lower end of a switch (6). At another end, the switch (6) includes an elongated portion (11) provided horizontally with a blind hole (14) provided in the center. A spring (3) is disposed into the hole (14) with a metal ball (4) attached to an end thereof. A valve cap (5) is provided on a bottom portion of a casing (1) with a plurality of spherical grooves (15) provided therein. The metal ball (4) and groove (15) are engaged through the restoration force of the spring (3).