Listing is for the cartridge and retaining ring. These are 1/2″ drive ratchet repair kits where the whole thing is inserted button first from the drive side of the handle and then held in place with a retaining ring on the drive side. See photo above for how this assembly works (the ratchet handle is not included in this listing). They are nice quality and will fit older Blackhawk 1/2″ round head ratchets and other makers using this cartridge design. These were probably made by New Britain as they made ratchets for Blackhawk as well as many other manufactures around this time. These parts came from an old tool store liquidation and they had all kinds of New Britain & Blackhawk tools and unlabeled bulk packed parts.This sale is for a 9 tooth cartridge which will fit a 45 tooth handle. The photo of the 12 tooth and 9 tooth cartridges is for reference only. I have another listing for the 12 tooth cartridge (fits 60 tooth handle) if you need that type. Please review the following dimensions and compare them to your ratchet in order to determine if this kit will work with your particular ratchet handle: The retaining ring opening is 1-1/16″ (the bore size the cartridge and retaining ring must fit through)Diameter of the inner cartridge is .9660″ (the part that goes inside the ring of teeth in the handle)Diameter of the shoulder is 1.0535″ (the widest part that the retaining ring seats against)Height of the cartridge is .6280″ (the thickness from the top of the shoulder on the button to the bottom of the shoulder on the drive, the part that must fit within the ratchet handle and still leave the retaining ring groove accessible)Please visit my store Big Texas Yard Sale for additional items you might be interested in. Shipping Policy: Shipping is almost always via the US Post Office to anywhere in the USA. If more than one shipping option is available be sure to check the different options as the rates can vary. If you want more than 1 of an item or several different items I will combine items for a shipping discount. Please add them to your cart and request a combined invoice. I generally ship within a day or two of receiving payment. Insurance is included in the shipping cost. Condition & Descriptions: I do my best to describe items as accurately as I can. Examine the photos closely as they are considered part of the description. Many of the items I sell are used, or new but in less than ideal condition. They may be missing or have damaged packaging, or have imperfections such as stains or less than perfect surface finish, but nothing that impacts their intended use unless otherwise noted. Please ask any questions before you bid or purchase an item. Warranty and Returns Policy: All items are sold with a 30 day returns policy. To receive full refund the item must be received back in the same condition it was sent out in. Refunds do not include return shipping charges. Payment Policy: If the listing is an auction, payment is required within 5 days of close of auction. Buy It Now listings require immediate payment. Feedback Policy: Once you leave positive feedback indicating you are happy with your purchase, I will leave feedback. If you are not happy, please contact me prior to leaving negative or neutral feedback and give me a chance to respond. Good communication is the key to a successful transaction. Thank you for shopping Big Texas Yard Sale!