MT 4-5 Sickle Scaler with Yellow Handle. Posterior sickle, adapts like the 204S with the same angulation. More rigid with an extended reach for removal of tenacious calculus. Longer terminal shank and blade providing more reach and enhanced posterior adaptation. Ultra-light, solid resin handle with ultimate tactile sensitivity. Shaper, harder and tougher blades. Made in USA. Sterilizable by all methods. Single instrument