Olympia 10-112 Tongue and Groove Joint Pliers - 12 Inch. The 10-112 is a genuine product manufactured by Olympia Tools, who specialize in tool manufacturing with their goal of "Making Your Job Easier". This particular tool is a Tongue and Groove Joint Plier that has an overall length of 12 inches. The pliers have a "tongue and groove" design which allows for the clamping are to be adjusted in width for different size applications. It also has ergonomic handle grips which not only provide comfort, but also protect from injury due to slipping and pressure. Limited Lifetime Warranty from Manufacturer.