BILLIONAIRE'S #451 - Is More on the Medium Side but Still Much Firmer than a Medium; It is Also Less Firm than the TP600. Good for Cuts 2.5 to Wolfing Stage. Great Pull; Penetrates ALL Layers of Hair. The CURVE Contours to the Shape of Your Head for Better Grip, Better Pull & More Coverage Which Means Faster Results! The POINTY TIP Isolates the Crown of Your Hair (Swirl or Beehive) for Better Development. NOT FOR Long Hair, Fresh Cuts or Tender Heads.