HONEYSEW Two piece set Upper and Lower Serger Knife plus Machine Clear Brush HONEYSEW Two piece set Upper and Lower Serger Knife plus machine clear brush Upper and Lower Serger Knife XB0563001 X77683001 Ideal for Brother 925D, 929D, 1034D The replacement of both the Upper and Lower blade will ensure a smooth professional fabric cut You will get 1pc lower knife + 1pc upper knife + 1pc clear brush