No beginning piper should be without these improved Ash Plugs, and even more advanced players may want to keep them as part of their regular set up. Hemp them to be not too tight at first, to quickly and easily pop them in and out to test the effect of using them or not. The thumb screws are so easy to adjust, simply unzip the bag and you can tweak the screw setting and be playing again in under 30 seconds. Surprisingly effective, and for me, an instant improvement on controlling strike-ins and cut-offs.