Brother coverstitch bias binding set contains a wide guide for wide bias tape that you will stitch on with the 6mm cover stitch, and a small guide for narrow bias tape which will be stitched on with the 3mm cover stitch.

For folding and attaching 6mm (1/4") or 12mm (1/2") bias tapes to fabric edge

You may also use the chain stitch to apply this bias tape

Part No; XB3387001 / SA230CV

Compatible machine models;

CV3440, CV3550