The 3.5v Tongue Blade Holder uses a Halogen HPX lamp that provides 30% more light output, for true tissue color and consistent, long-lasting illumination. It has a fiber optic diffuser for cool distal light. The universal clamp accommodates most tongue blades. 3.5v Tongue Blade Holder 3.5v Halogen Lamp Fiber optic diffuser Universal clamp accommodates most tongue blades