This is a new Snap-on™ FK100 3/8" Drive Fine Tooth Stubby Ratchet. This is a single item and not a set. It has a length of 4". This ratchet does not have a quick release. The manufacturer part number is FK100. It is a stubby ratchet and has a drive size of 3/8in. It is made for use in the automotive industry as a hand tool.