Y26 type hand-hold rock drill is used at mines,railway,irrigation and quarries to digging holes and for the second digging holes.It can be used to digging dry or wet by horizontal holes,vertical holes or angling holes on medium-hard rock or hard rock . Speicfication: Weight: 26kg Cylinder dia : 65mm Piston stroke : 70mm Air pressure : 0.4~0.63*** I***ct energy 30J I***ct frequencey 23HZ