Chef'sChoice M130 Professional Sharpening Station, White Perfect for most brands and knives, the sharpener includes professional sharpening, steeling and stropping stages Precision angle guides helps create edges superior in performance to original factory edges Sharpens both fine edge and serrated blades; produces steeled edges of unmatched quality, sharpness and consistency Re-sharpens most knives- kitchen, household, sports and pocket knives with minimum metal removal 3 stages- 100% diamond stage in stage 1; super hardened miniature steel in stage 2; and flexible stropping disks in stage 3.