1,use for grabbing broke stone,mineral and other loose materials in shaft. 2,suitable for the shaft with diameter from 5m to 8m Pendant wire, pneumatic,see below technical data:ModelCapability of grabProductivity(broken rock)Working air-pressureAir consumptionTotal weightGrab claw numberDiameter of closed grabDiameter of open grabHeight of closed grabAir cylinder diameterPiston strokeDTQ4L0. ...