These high-strength blocks are ideal for pre-tensioning lines or lifting heavy objects. Fiddle blocks are easier to deploy than our tree pulling kit (especially for beginners) because the system is applied on top of a host line instead of involving threaded host line. Fiddle blocks are generally stored fully rigged so that you simply attach the ends to host line (via the included Prusik) and anchor (a tree, vehicle, or even host rope again, using the included carabiner on your sling or other means). The fiddle block’s limitations are that it’s tlimited to 10 feet of working spread with the included (50-foot) rope; a friction device (like Portawrap) is required to hold drawn rigging line for multiple advances; and the standard package is slightly bulkier than the tree-pulling kit.
The drawing (below) demonstrates how pulling with 200 pounds of force results in a 5:1 mechanical advantage (1,000 pounds) of lift. Between pulls, a built-in cleat holds position on the line, which can be released with a snap of the wrist. Combine this kit with a Portawrap or other lowering device for the ultimate in compact power!
Kit includes two blocks, 50 feet of half-inch line with spliced eye, two steel carabiners & rigging prusik.