This Mammoth Comb must be used with the MAMMOTH BLADE CARTRIDGE by Kim Laube Co. Mammoth Combs Feature: E-Z snap on, no tools required. Engineered plastic does not flex or wobble in hair. Reduces Scissor Time. Does not detach due to our patented snap lock system. Reduces Hand Fatigue, Carpal Tunnel Syndrome. Smooth Even Clip with NO Tracks or Lines. Kim Laube Company is the ONLY manufacturer in the world to make the blade combs this BIG! Kim Laube invented the unique large sizes. Each comb is lazor etched for easy to read sizes. DO NOT USE ANY CLIPPER BLADE COOLANTS ON COMBS, IT COULD DAMAGE THE COMB. Please use Dr. Slick for cleaning maintenance on the combs. Fits most snap-on style professional clippers. The Mammoth combs are also the perfect companion to vacuum style grooming systems. Combs come assembled and ready for use. Impact resistant, Heat resistant, Chemical resistant. All Mammoth combs come in black only.