This Baby Lock lower serger blade fits these Baby Lock serger models: BLC4, BLES4, BLE3ATW-2, BLE3ATW, BLE1AT2, BLE1AT, BLS1, BLS3 A sharp lower and upper blade will keep your serger sewing its best. When the blade is sharp you will get a smooth cut on the fabric and the serger will feed the material through smoothly. When you serger blades get dull then the fabric does not feed through smoothly causing your stitches to wad up and the serger to jam.
