All Whiteline Sway-Bars are constructed of solid high-grade steel, and most of Whiteline Sway-Bars are available in either 2-way or 3-way adjustable versions.

A 3-way adjustable bar is rated at its neutral setting, which is the middle hole on the bar.  If you mount the endlinks to the bar using the soft setting (making the lever arm longest, or the furthest hole away from the sway-bar mounts), this will reduce it’s effective diameter by approximately 1mm.  Mounting the endlinks in the stiff setting (with the shortest lever arm) will increase the bars effective diameter by aproximtely 1mm. 

So a 3-way adjustable 22mm bar can be set to be either 21mm, 22mm, or 23mm.

A 2-Way adjustable bar is rated at its neutral setting which is actually in-between the two mounting holes on the bar.  The softer setting will actually decrease the bars effective diameter by approximately .5mm, where as the still setting will increase the bars effective diameter by approximately .5mm.