Harken Ratcheting Fiddle Block with Cam Cleat. Lower block for a 4:1 type system. Lever turns ratchet on/off. Lower block is approx 57mm, upper block is approx 35mm. Used part in good working condition, exactly as shown in photos. Sheave/bushing on becket is mostly gone, which should not affect perforamnce. Cam cleat has been replaced with a similar Ronstan brand cleat.