Symphony Wave 6.5' Tooth Blender Curve w/Dual Finger Rest. The opposing finger and thumb with dual finger rests makes this tool one of the most versatile: allowing the tool to be "flipped" either comb up or comb down. Comb up = rough up. Comb down = natural look. Teeth on the comb blade are "v" notched with edges negative honed which allows for smooth snag free cutting. Manufactured with durable high alloyed 440 stainless steel. The convex edges are triple honed with extra hollow ground. Moves and cuts like a dream!