HP65 is designed for hand installation of plastic pipes up to Ø90mm (using available accessories). The big advantage is excellent accuracy and low weight: 24kg, that's why HP65 is handy to use. HP65 is recommended to install PE pipes up to Ø50mm. The tool is working fine with expander Ø100mm in the second operation which allows installing pipes up to Ø75mm. Using expander Ø120mm in hard soils results in low progress which automatically suggests using bigger/more powerful tools. Reverse mode is switched on by pulling the air supply hose. Easy and reliable switching between working modes enables efficient piercing and also allows quick reverse of the mole in emergency situations. A very important factor is that switching reverse mode on doesn't require turning the air supply hose which might be difficult. Sometimes it might not be possible due to lack of stiffness of the air supply hose when the mole is far deep in the ground from an entry pit. HP65 can be used for ramming steel pipes Ø50mm diameter.