Compound Leverage Comealong:
You can use two Mini RopeTies to pull or hoist a heavy load with compound leverge (9X theoretical leverage is reduced to 3.24X accounting for friction losses at two clam cleats). Using a primary lifeline that is permanently attached with a prussic knot you can use this configuration for hoisting a person with safety backup.
The prussic knots can slide when not under tension and the primary lifeline insures against the possibility of failure on the secondary system (the RopeTie is not rated for primary lifesaving loads).
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