A hemostat can be bulky and difficult to use with small or very long pieces to turn, and their teeth can damage fabrics as you pull on them. I have used many tools and methods to try and turn mini fabric tubes and small sewn parts, and by far, the best one available is the Fasturn tool.
https://www.fasturn.net/ I have no connection to this company and am not being compensated for my recommendation in any way, just commenting that their system works with any weight or type of fabric without stretching, tearing or damaging them. It might be more expensive than a hemostat, but after ruining many parts and experiencing a lot of frustration, if you do a lot of turning, in my opinion, it is the only way to go.