Replacement DLC T-Blade Trimmer Head for the Wahl® Pro Series® High Visibility Trimmer. The diamond hard carbon coating allows this trimmer head to cut smoother and stay cooler. It provides a 4X closer cut than a traditional Wahl® trimmer blade and has a unique attachment that is specific to the thumb screw attachment design on the Pro Series® High Visibility Trimmer. Achieve skin-close precision for trimming and edging facial hair with this replacement trimmer blade head. Note: the trimmer is not included.