"Darkside Green" Hyperglow. This new color is black/ultra dark green during the day and glows green in the dark! These LBS button's are made from the high performance glow in the dark acrylic composite product "Hyperglow". These are charged by light and continue to visibly glow for hours. Fits all Strider knives and many other knives that take the 3/8" diameter "Hinderer Lockbar Stabilizer" button.