This tool is not described in detail or there are variants of small keys. Yes, it's a 1/2 key. Yes, small does. Yes, that is the correct part number, but it is not the correct part number. I purchased this item to replace my 1/2" wrench that I lost from my 68402 kit. Although the part number is the same, the key is different. The main differences include the following: the size is engraved on the handle instead of the head ends like the others, the length is 6 inches (should be 7 1/8 inches)β¦