BROTHER Sewing Machine Standard Screw on SAFETY NEEDLE FINGER GUARD - XG3437001
This is a standard fitting finger guard, this screws onto your foot shank with the foot shank screw,
Fitting - Just remove the foot shank/holder screw then slot the guard onto the screw then refit - see other photo to see fitting
This is a Genuine Brother item, and comes loose.
Part No. XG3437001