Interlocking
Maintaining locs by pulling the end of each loc back through its own root with a tool.
Also: latch hooking
Interlocking is a way of starting and maintaining locs. The end of the loc is pulled through its base, near the scalp, with a latch hook or fine tool, which knits new growth into the loc like a stitch. It keeps roots neat, needs no product and holds up to washing, so it suits active people. Done too often or too tightly it can thin the roots. It is the usual method for very small locs.