Excellent quality potentiometers - I will use nothing else! The solid shaft variant is available in a wide variety of resistances and taper types, with a perfect shaft length and good mounting hardware. They take up very little space and can be mounted to panels with pins used as solder lugs or mounted directly onto PCBs. I use pliers to flatten the side mounting pins and they will easily slip into a breadboard, and grind the indicator pin on the top off with a Dremel tool when I don't feel like drilling the additional hole in my panels. The sealed design has a firm but smooth feel as compared with unsealed designs, which I like.