If you want to grip something firmly for soldering, all you need is a pair of pliers and an elastic band.  You can vary the grip force by changing band thickness or length and by moving it closer or further away from the jaws. Closer to the jaws = less force.  Simple, quick and effective.
Great idea in its simplicity
Nice to see a nice simple tip. <br>Bonus round: <br>If you need a handy hemostat, or a backup heat sink for soldering, try this rubber band trick on a needle-nose plier - especially a long-nose version.
tats nice idea...especially if you dont wanna buy a vice....couple of clips on each corner would also have helped for proper gripping <br>

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