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From the Thingiverse blog:

Rhys Jones’s set of tweezers consists of PLA and silicone, printed in one run. KeanuWoah!

A couple of days ago, we needed another set of tweezers for the RepRap lab. Naturally, rather than going and buying a pair I thought I’d RepRap them. After a quick search around Thingiverse for inspiration, I thought we could do something a bit more fancy using the new multiple material setup. So I designed the following pair, where the top of the tweezers consists of a PLA inner section for rigidity/stiffness, which is then encased in silicone for added grip, and printed in one shot.

PLA & Silicone Tweezers on Thingiverse.