Arthroscopically tied stacked half-hitch knots and sliding knots are best l
ocked with half-hitches on alternating posts. It is possible to switch post
s without rethreading the suture through the knot tier by flipping the half
-hitch. This article describes extra- and intra-articular techniques for fl
ipping half-hitches to switch posts. The post switching is most easily acco
mplished by transforming the half-hitch to an intermediate flat knot with s
ymmetrical throws. This intermediate step is imperceptible when the sequenc
e of actions is rapid. An over-under half-hitch becomes an under-over half-
hitch when the post is switched.