1,double drum wind. 2,applicable for free fall punching and piling 3,mainly use in construction site,mine,port,dock, ... & piling for bridge, dock, construction works and so on.This winch can operate by hand and motor, it can be hand controlled ... KW5545Machine dimention mm3800×2375×17002935×2080×1550Machine weight KW70005000 punching and piling hoist