The F-835 is part of Snap-On's older family of "830 series" rats which is their first ever completely sealed ratchet head, using a type of ring seal for the selector, plate and gear assembly. They were all 30 tooth, with a two tooth per side engagement pawl. Many have called these Snap-On's most favorable ratchet, as they were and still are a very popular desirable rat even today. The repair kit is still easily available, kit RKRFC830. They are a more affordable alternative to the more expensive newer FF80 counterpart. Legendary Snap-On.👍