Smooth Stainless Steel Combs glide through the coat for snag free grooming. Universal Self-Adjusting Snap-On Combs feature a four sided security fit. Features a Storage Stand and 8 Color Coded combs for easy reference. Can be used with number Ten, Fifteen or Thirty blades. NOT for use with 40 blades. These combs will fit all Wahl, Andis and Oster replaceable A5 type blades that are used on professional grade clippers.