A hackle is a metal plate with rows of pointed needles used to blend or straighten hair (or flax, for which see heckling comb).
[1] This tool is used as a preliminary step in the process of custom wig making.
This is paramount, because the hackle is used for three main purposes: mixing or blending hairs in special blends of colours, untangling wigs or hair extensions, and preparing the hair in a single or double draw.
For single drawn, the shortest hairs in the bundle at the root area are removed.
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