Here is the threader that really works on all Serger/Overlock sewing machines. It is longer and stronger that most other Serger threaders. The length and strength makes it easier to thread the loopers and with its fined threader, it can reach thru to the smallest of Serger needles and thread it with ease. Other product from Collins for your Serger/Overlock sewing machine:-No.50 DUST-OFF A non contact, variable controlled dust remover.-No. 60 TWEEZERS Extra long, 6 inch bent with tight grip.