Fits Dillon Precision 550/650/1050 powder measure. Eliminate galling problems when loading with Vectan SP-2 and similar fine powders. Eliminate sticky powder slide problems. Includes easy to adjust calibration knob and indicator. Allows powder drop changes to be easily made with your fingers instead of having to use a wrench. Does not include hardware. You'll reuse the screw and other hardware from the stock bar you're replacing. Available as the complete bar and knob for $41.58 or just the knob for $5.35.