WE HAVE A LARGE, ABOUT 6 FEET ACROSS, WOODEN WHEEL AND PULLEY SYSTEM, ON OUR FARM. AT ONE TIME IT WAS USED TO BUTCHER LIVESTOCK AS THIS WAS A MINK AND FUR FARM. WITH THE PULL OF THE ROPE YOU CAN LIFT MOST ANYTHING. I'M CURIOUS WHAT EXACTLY THIS MIGHT BE CALLED AND IF ANYONE HAS ANY INFORMATION...