Specifications: Color: Silver Material: Metal Hook Blade Size: 38x13mm/1.5x0.51 inch Diagonal Blade Size: 41x8mm/1.61x0.31 inch Compatible With: Brother 925D, 935D, 1034D; XB0563001 X77683001 Package Includes: 6 x Serger Blades Notes: Please allow slight size errors due to manual measurement. Please allow slight color differences due to different displays. Sturdy Material Our sewing machine blades are made of metal material, strong and sturdy, good quality, can be applied for a long time; Accurate angle blades ensure smooth sewing and good cutting. Quantity and Size You will receive 6 pieces serger blades in the package. The hook blade is approx. 38x13mm1.5x0.51 inch, the diagonal blade is about 41x8mm1.61x0.31 inch, the replacement of both the upper and lower blade will ensure a smooth skilled fabric cutting. Compatible Models Brother 925D, 935D, 1034D. Blade Compatibility Upper knife XB0563001 and lower knife X77683001. Convenient to Use The serger knife overlock blade is easy to install and trim the fabric very easily; New serger blades are easy to install and theyre pointed and trim your fabric beautifully.