On Sun, 04 Mar 2018 04:08:48 +0100, Emanuel Berg
wrote:

One should have a polygrip [1] only with soft
plastic or rubber jaws as that would be enough
without damaging the material.

[1] https://en.wikipedia.org/wiki/Tongue-and-groove_pliers

Google for "soft jaw pliers".
https://www.google.com/search?q=soft+jaw+pliers&tbm=isch

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558