Brother Serger XB0563001 Upper +X77683001 Lower Knife Blades for 929D, 1034D, 1134DW, DZ1234, 1634D,

Brother and AllBrands recommends changing both knifes at the same time to avoid the new knife blade from getting damaged or prematurely worn by cutting against the older blade
Nancy G, Antelope CA
I'm a long-time customer of Allbrands and find them a trusted company with a very large selection of sewing and pressing items.

Debbie, Alabama
very happy with purchase, have used allbrands several times over the years. ordering sewing machine parts, accs. etc has always been easy. thanks.