Use this one applicator to polish-scrub-wax and apply protectants!The Sonus SFX Pro Applicator has a cut/scrub side for light compounding and polishing and a fine finish side for high gloss polishing and applying sealants or waxes. The Sonus SFX Pro Applicator is a generous 4 inch by 6 inch allowing you to cover a lot of area very quickly. The Sonus SFX Pro Applicator is our best choice for interior work too. Use the yellow scrub side to clean your leather and vinyl using Sonus Leather Cleaner. When your finished cleaning flip the applicator and use the fine finish side to apply Sonus Leather Conditioner. Sonus