The clipper guards that barbers use are almost as important as the clipper; may be even more important. Two favorite clipper guards are the red Speed-O-Guides and the purple Andis Nano Magnetic Guards. Both of their popularity is based on performance, precision, and personal usage.The Speed-O-Guides have been around for over 12 years. The Nano’s are the new kid on the block; they have been around about 4 years. Which ones are your favorite; Reds or Purps?