□ This is a Snap-on flex head ratchet handle, model F831. □ Total length: approximately 285mm □ Drive size: 3/8" sq (9.5mm) □ Number of gears: 30 □ There are scratches and dirt from use, so please refrain from bidding if you are looking for a perfect item or are overly concerned about condition. Although it shows signs of use, this era of Snap-on flex head ratchets do not have a mechanism to tighten the head with a screw. However, the head is stiff and functions well.