Machines & tools

A machine that sews two or three parallel rows of straight stitching on top with interlocking looper threads underneath, used for hems and flat seams on knits.

A hook-like mechanism on an overlocker or coverstitch machine that carries thread beneath the needle plate to interlock with needle threads, forming the stitch's underside.

The upper and lower knives on a serger that trim the fabric edge just ahead of the needles as the seam is stitched.

A narrow, tightly wrapped edge finish produced on an overlocker by adjusting the stitch finger and tension so thread coverage rolls the raw fabric edge under.