Oggy Knobbs CB 500 F, CB 500 X & NX 500 13-25 Frame Sliders - BlackOggy Knobbs CB 500 F, CB 500 X & NX 500 13 25 Frame Sliders Oggy use only the highest quality materials to achieve the strength and appearance your investment deserves. Fitting Oggy Knobbs can significantly reduce the size of your repair bill after an accident. Frame slider kits come with full instructions and require only standard workshop tools to install however sound mechanical knowledge and a quality torque wrench are required to correctly