Description: Made of oxidized CNC metal material, lightweight and durable. Incorporates 2 stainless steel ball bearings, direct replacement ball handle knob. With supplied screw nut, easy to install to the handle. Suit for saltwater/freshwater use, corrosion resistance. Extra cranking power, appealing appearance, easy for cleaning. Specification: Material: Full Metal Bearing Size: 4x7mm Knob Diameter: 33mm Package Includes: 1 Set of Fishing Reel Handle Knob(only a knob and screw nuts, without handle)