Yes. Needle stoppers work with all three types: straight, circular and double-pointed needles. On straight needles, needle caps act as stoppers to keep stitches from slipping off when you put your work aside. On circulars, circular needle stoppers cover both tips or each one separately so the cable doesn’t pull on the fabric when stored. On double-pointed needles, point protectors prevent one end from sliding while you handle the other, reducing accidents when moving your work across the table. For double points, the protectors are usually paired with an elastic that links and holds the needles together.
The key is choosing a snug fit without forcing. If the yarn is slippery, put on the knitting needle stoppers before lifting your work and spread the stitches evenly. For project transport, check that no stitch is pressed against the edge of the stopper to avoid marks or snags. With this habit, protecting needle tips and stitches becomes automatic, saving you from corrections when you pick your work back up.