I have both the Sidewinder and the Deluxe Sidewinder. I bought them because I have quite a few vintage sewing machines and not one of the bobbin winders work. I got the Deluxe Sidewinder because it had an extendable thread guide so I could wind bobbins off my thread cones. It also comes with spindles to fit different types of bobbins for various models of Baby Lock, Bernina, Brother, Elna, Handi-Quilter, Gammil Bronze, Janome, Pfaff, Riccar, Singer, Viking etc. Let me qualify that I don't have any of those machines (except a Brother) but it winds bobbins perfectly for my vintage Singers. The original Sidewinder had some issues but it still worked.