Many people use a shackle ... Not just any knot will work, however. Here’s how I do it. Tie a knot at the end of the halyard. If the line is thick, a figure-eight knot will suffice.

There are two basic tie-in knots climbers should ... had to cut the rope because of a fused figure 8. However, there are tricks like tugging on the knot using the two strands on either side ...