Machines & tools

A looped stitch formed by a single needle thread interlocking with a looper thread in a chain-like pattern beneath the fabric, used alone or alongside cover stitching.

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 serger or coverstitch feature using two independently adjustable feed dogs, front and back, to stretch or gather fabric as it feeds, preventing waves or puckering.

A serger stitch sewn with loose tension so the seam pulls flat and open, leaving a ladder of thread on one side, often used decoratively on knits.

An overlock stitch using two needle threads and two looper threads to form a durable seam that both sews and finishes an edge in one pass.

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.

A machine that simultaneously trims a fabric edge and encases it in interlocking looped thread, using multiple threads, needles, and loopers to finish seams quickly.

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.