pneumatic hammer
Percussive tool that is powered by compressed air; with the help of a piston, it activates a tool, which breaks through very hard matter such as rock and concrete.
flexible hose 
Flexible hose through which compressed air from the compressor it is attached to enters the hammer.
flexible hose connection 
Fastening device with a metal part that accepts the flexible hose so that compressed air can enter the hammer.
throttle valve 
Movable part that is opened by the control lever to let compressed air into the hammer.
exhaust port 
Opening through which compressed air is expelled from the pneumatic hammer.
lubricator 
Device that automatically oils the various parts of the hammer to prevent wear.
control lever 
Grip used to operate the hammer; the lever opens the throttle valve so that air can enter the hammer.