Water driven hammer device
Wedge arrangement for locking together hammerhead and anvil
Well drilling apparatus
Wholly air-controlled impact mechanism for high-speed...
Wobble device for a hand-held power tool and a hand-held...
Wobble device for a hand-held power tool and a hand-held...
Wrap spring clutch for percussive apparatus
Wrap spring clutch for percussive apparatus
Wrecking apparatus