They are used for hoisting gear aloft and can be kept permanently rigged, and as they often have to bear the weight of a man they must be inspected frequently.
Zisetyenziswa ekunyuseni igiya kwaye zingagcina okokoko zixhobisa isikhephe ngemaski, kwaye njengoko zigcineka ngokobukhulu bendoda kufuneka zihlolwe maxesa onke.