I bought these when I was struggling to get the right rhythm track for the multi-track version of Nowhere To Hide. I figured that a shaker sound was what I needed to drive it along, and while the shaker sound on the PSR-500 worked well on Sunshine, it couldn't give me what I wanted here. So I visited Allegro Music in Southend to try out a few percussion options, and the one that gave me the sound I wanted was the egg shaker - just 99p each! I bought two - a wise decision as it turned out, as two of them being shaken together sounds much better than one. Expect them to make appearances on future tracks!