Teachers and therapists said they wanted to be able to adjust on-the-fly (fully cluttered) without help from anyone. Our spring-loaded plunge knob makes adjustment a snap—each leg can be adjusted in less than three seconds with no tools. The secret of our fast, simple knob-adjustment? Custom-designed extruded metal columns that provide precision movement, taking out the wobble and inexact alignment that plagues cheaply made knob-adjusted tables. Simple, affordable and convenient for everyone.