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Dismountable needle / needle

Dismountable needle
Dismountable needle

When sewing, the finishing thread is often too short to tie a knot. "Dismountable needle" has a removable needle shaft with a screw end that can be reassembled back and allow to tie a easy knot
just using the needle eye and save thread.

University

Xuzhou Insititute of technology

Xuzhou Insititute of technology
Xuzhou City, China