Chef&#39;s Choice 130 Professional Sharpening Stations 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 edge 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