RP140 is a percussion rod designed to make holes with depth up to 140 cm diameter 14 mm in soft and moderately stony terrains or under the asphalt surface of roads. The holes are necessary in the location of underground gas leaks, an electronic “sniffing probe” is then inserted into holes to check the gas presence in the ground. The use is easy and the result is the best, the operator simply points the tool and then “hammers down” the rod with the upper sliding piston, this percussion will push the rod till the needed depth, for extraction the piston must be hammered up word. Another advantage of these tools is that the operator can feel when an object has been