I love twin needles!
They are really easy insert, as they have a single post like normal needles.
they come in different widths, so you can vary the look, and use them decoratively. And they come in a myriad of types too, just like regular needles.
The biggest reason why i love them, is to hem stretchy or jersey fabrics. All shop bought stretchy clothes are done with a machine called a cover stitch. All it does is hem, probably not a machine most home sewers plan to invest in. But…. You can get a very professional finish, using a twin needle. It’s great for alterations too, no more wearing an overly long t shirt.
Ok- they cost a wee bit more than normal needles, but they last
NEVER use them with a zig zag, you may break them, as they can swing wider than the hole in the machine’s footplate
You’ll need to thread up with a second spool/reel of thread.
Watch this video to discover how easy it is to use these needles