This Lefty Chameleon D/A linerlock by Butch Vallotton has a hidden push button under the rubber scale on the back side of the handle. Leaf spring action and smooth manual action. Bead blasted blade and FRN handle scales with rubber inlays, stainless steel liners and tip up clip. Good function, good lockup and blade seating. Numbered #414 on back side of blade. Scuffs/scratches are visible on the blade and handle otherwise the knife is in Excellent condition.