The Janome Instructional DVD for Serger Models 744D/644D is a valuable accessory designed to assist users in maximizing the potential of their Janome serger machines. This DVD provides step-by-step instructions on how to properly operate, maintain, and troubleshoot the Janome 744D and 644D serger models. Created by the reputable Janome brand, this instructional DVD is an essential tool for sewers looking to enhance their skills and efficiency with their serger machines. Whether you are a beginner or an experienced seamstress, this DVD will guide you through all the features and functions of the Janome serger models 744D/644D.