It isn't a matter of IF you get a thread caught in, around, or behind the bobbin case, but WHEN - and having the right tool to remove it when that happens will ease any frustration and get you back to sewing in no time! You'll impress your friends too! The all metal Thread-O-Stat Thread Grabber has a smooth jaw so the thread is gripped tightly and securely as you clamp the handles together. Unlike a typical hemostat, which has a toothed or jagged jaw preventing a firm grip, the Thread-O-Stat is more like tweezers - only better! You will be able to grab a hold of that little thread, lock onto it tightly for easy removal, and the Thread-O-Stat won't let go. The Thread-O-Stat also works great for serge threading, or even for grabbing and easily pulling the papers out after paper piecing. You won't have to worry about this tool getting lost in hubby's toolbox because it will be easily recognizable with its happy red color and the little Singer Featherweight stamped on the side. Approximately 5-1/2in long x 2-1/2in across handles when closed.