13-1/2 INCH KRAUSE DISC OPENER ASSEMBLYReplaces Krause 5250 484 0A Interchange 864KR5250, Net Weight (lbs) 5. 60 Brand AgSmart Make Type Model Krause Grain Drill Multiple PLANT WITH CONFIDENCE. Assembled in Jonesboro, Arkansas, SMA Disc Openers use only North American blades along with carefully selected components to continue to the field proven performance that the toughest Farmers expect. All openers carry a One Year Warranty against defects in materials or workmanship.