No sharp edges to drag on holsters or snag clothing because these low profile sights are designed specifically for concealed carry. EDM machined from 4140 steel, then heat-treated to Rc 38-40 and vacuum tempered. Fully Adjustable (Adj.) models are click-adjustable for windage and elevation. Elevation Adjustable (Elev.) model provides the consistency of click adjustment for elevation only. White Dot (WD) model features two white, ABS plastic .070" (1.8mm) diameter dots, one on each side of rear notch. Available to fit 1911 pistols equipped with Novak low mount style dovetail. Mfg: Kensight Mfg