Serger Looper Threader, Universal #L2178 : Sewing Parts Online
Serger Looper Threader SLT - Etsy
Amazon.com: Serger Needle Threader MTQY 2 Set Serger Looper Threader and Serger Needle Threader with Protective Plastic Sleeve for Sewing Machine Needles Overlocker Threader Set