Abstract: A pneumatic rust-removing tool includes a main body having a chamber and an opening at a front end of the chamber, an impact block reciprocatingly moveable back and forth in the chamber, a spring disposed in the chamber, a mount disposed in the chamber and located between the impact block and the spring, rust-removing needles disposed with the mount and extending through the opening, and a slide sleeve disposed to the main body in a way that the slide sleeve is moveable back and forth relative to the main body. The slide sleeve is provided with a plurality of through holes, through which the rust-removing needles extend respectively. As a result, the pneumatic rust-removing tool can quickly adjust the exposed lengths of the rust-removing needles to adapt to different operational scenarios, thereby enhancing work efficiency and reducing the economic burden on the user.

Abstract: A pneumatic wrench includes a handlebar having a main body, two extension walls defining an engagement notch therebetween, and a first air channel extending inside the main body and the two extension walls, and a tool head having a head portion, a neck portion extending from the head portion into the engagement notch, and a second air channel extending inside the head and neck portions. A pivot shaft is inserted through the handlebar and the tool head such that the tool head is swingable relative to the handlebar. The pivot shaft has a shaft body with a shaft hole, and two first and one second through holes in air communication with the shaft hole. The first air channel is communicated with the second air channel via the first and second through holes and the shaft hole. As such, the pneumatic wrench is angle-adjustable to fulfill user's need.

Abstract: A handheld sander includes a main body, an extension arm, a follower draft, and a transmission shaft. The main body includes a housing and a drive shaft rotatably disposed in the housing. The extension arm includes a pivot portion rotatably connected with the housing in a way that the extension arm is rotatable relative to the housing, a distal portion opposite to the pivot portion, and an internal accommodation penetrating through the pivot portion and the distal portion. The follower shaft is rotatably disposed in the distal portion of the extension arm. The transmission mechanism is disposed in the internal accommodation and connected between the drive shaft and the follower shaft for transmitting a rotational power from the drive shaft to the follower shaft. As such, the handheld sander can perform a grinding work in a limit, narrow working space.

Abstract: A pneumatic wrench includes a handlebar having a main body, two extension walls defining an engagement notch therebetween, and a first air channel extending inside the main body and the two extension walls, and a tool head having a head portion, a neck portion extending from the head portion into the engagement notch, and a second air channel extending inside the head and neck portions. A pivot shaft is inserted through the handlebar and the tool head such that the tool head is swingable relative to the handlebar. The pivot shaft has a shaft body with a shaft hole, and two first and one second through holes in air communication with the shaft hole. The first air channel is communicated with the second air channel via the first and second through holes and the shaft hole. As such, the pneumatic wrench is angle-adjustable to fulfill user's need.

Abstract: An impact device includes a transmission shaft, an impact cylinder, two first impact pins and a first ring. The transmission shaft has an impacted section disposed in the impact cylinder, an extending section extending along an axis, a first protrusion extending toward a first radial direction, and two first concave surfaces located at the first protrusion. The impact cylinder has two elongated protrusions and two first radial holes separated by the elongated protrusions. The first impact pins are received in the first radial holes in parallel to the axis and abuttable against the first concave surfaces. The first ring is sleeved onto the impact cylinder and the first impact pins and has a first narrow groove in which one elongated protrusion is located, and a first wide groove in which the other elongated protrusion is movably located. The impact device has sufficient torque output and long lifetime.

Abstract: An impact device includes a transmission shaft, an impact cylinder, two first impact pins and a first ring. The transmission shaft has an impacted section disposed in the impact cylinder, an extending section extending along an axis, a first protrusion extending toward a first radial direction, and two first concave surfaces located at the first protrusion. The impact cylinder has two elongated protrusions and two first radial holes separated by the elongated protrusions. The first impact pins are received in the first radial holes in parallel to the axis and abuttable against the first concave surfaces. The first ring is sleeved onto the impact cylinder and the first impact pins and has a first narrow groove in which one elongated protrusion is located, and a first wide groove in which the other elongated protrusion is movably located. The impact device has sufficient torque output and long lifetime.