A free arm on a sewing machine is a handy feature that makes it easier to sew small or hard-to-reach areas, like sleeves, pant legs, or cuffs. It’s called a “free arm” because when you remove the flat part or extension table of the machine, the narrow, round arm is left exposed. You can slide small or circular pieces of fabric onto this arm, giving you better control and access. This ... https://sewingwire.com/what-is-free-arm-on-a-sewing-machine/