That’s where a pair of hair clippers come in: With slightly longer guards, they’re a less risky option for trimming — and if you’re determined to only own one piece of kit, some do come ...
As someone with fine, straight hair, I don't have the thickest of beards, but even if I were to, I'd have no concerns over the trimming prowess of the Beard Hedger's "SkinSafe", titanium coated ...