Learn English – Word for “difficult to twist or turn”

single-word-requestssynonyms

Sometimes knobs have a certain mechanism built in (like a detent) that gives them a bit of resistance by design – so that they are more difficult to twist to varying degrees. I'm looking for a word or technical phrase to describe this type of action. Something that means "difficult to twist" but not necessarily "sticky" because it is by design, not due to lack of lubricant or corrosion.