AFTCO's Super Extra Heavy Duty tip-tops are built for super strength and offer unequalled .410-inch 'knot clearance' - the greatest of any roller guide or tip-top on the market.  SXHD Roller Tip-Tops are built to handle the heaviest lines and the biggest fish! Equipped with the highest standards in quality and corrosion resistance, special derlin insulators and stainless steel logo plates eliminate corrosion between rollers and frames.  SXHD roller tip-tops are machined from harder T-7075 billet aluminum (to resist wear), and are anodized with a double-thick hard coat, but only in black.