Bear & Son Butterfly Knife Black Edge Wood Inserts. This Smooth Black Butterfly knife by Bear and Sons Cutlery is light and durable and a perfect fit for anyone! It features a 4" high carbon stainless steel blade and Smooth black G10 handles. It is 5 1/4” closed. 4” high carbon stainless steel blade Hollow ground blade Smooth black G 10 handles Silver bolsters 5 1/4” closed