The feather duo is a stackable version of the popular featherpro feather board. The feather duo is ideal for taller material feeds, but can also be broken down and used as two individual featherpro feather board. Comes with ultralight and standard feathers as a value bonus. Revolutionary design consists of gardened foam feathers that provide a smoother glide on the infeed, will not mar soft woods and offers excellent protection against kickback. The feathers feature a hinge that during kickback with pinch and hold material against the fence thereby absorbing energy and protecting you. Foam feathers absorb vibration to minimize chatter or chatter marks for a cleaner cut. Featherpro feathers are thicker and have a greater surface contact area, which disperses the tension over a wider area. If you accidentally cut a feather, simply replace it. No need to replace the entire feather board. The foam feathers protect cutters from damage if contacted.