Over the past few months, I have purchased three Thalia capos to be paired with high end ukuleles I have: (1) Cocobolo Ukuleles 5-String Baritone (Green Angel Wing w/Gold); (2) Kanile’a DR-T Custom/Curly Redwood & Cocobolo (Hawaiian Koa Celtic Knot w/Gold); and (3) Ko’olau T-100 SP/Adirondack Spruce & Master Grade Koa (Hawaiian Koa Celtic Knot w/Blackened Chrome). While the Cocobolo Ukuleles baritone has a rounder neck such that the harder inserts that are included in the Thalia kit provide a perfect fit, the Kanile’a and the Ko’olau, both being custom top-end instruments, have thinner necks, such that the provided Thalia inserts (even the hard ones) are “just at the edge” of a consistently “confident” barre — it was really at the knife-edge. But, the addition of the light “Ukulele Sock” to the “trigger” of the capo adds just the slightest additional grip-pressure to add that “barre confidence” without turning the capo into a clamp. It’s like the difference between the pressure one applies if you are an experienced and confident barre chord player versus the pressure a new-to-barre-chords player might apply. . . . Perhaps a long review for something that literally costs (as of this writing) $1.00. In other words, if you are buying one of the Thalia $85/$95 capos for a $4,000.00+ ukulele (which I was with both the Kanile’a and Ko’olau ukuleles), for a high-end uke with perhaps a thinner neck, go ahead and “splurge” to get one (or five) of these $1.00 “socks” to see if your capo might fit your instrument just a bit more cleanly.