The TecoTek spark plug socket set is constructed of durable, heat treated chrome vanadium steel, these sockets also feature a mirror polish finish. 6-point opening of spark plug sockets snugly fits spark plug hex nuts without slipping. Each socket has a rubber retaining ring inside to keep your spark plug from getting damaged. Size Include6pt spark plug socket 58Inch, 34Inch, 1316Inch, 14mm, 18mm, 38 Inch drive ratchet handle, spark plug gapper, universal joint, 3, 6 and 10 long extension bar. Its a high quality set for DIY spark plug removal and installs. Premium CRVConstructed of durable, heat treated chrome vanadium steel, these sockets also feature a mirror polish finish . They work great and make removing and installing spark plugs a snap. 6POINT DESIGN6point opening of spark plug sockets snugly fits spark plug hex nuts without slipping. Each socket has a rubber retaining ring inside to keep your spark plug from getting damaged. High Visibility MarkingsThe storage case has printed size and all drive tools have stamped markings on sockets for easy identification. Convenient for getting suitable size accessories, saving time and effort. Service GuaranteeAll TecoTek Tools meet or exceed ANSI performance standards. It comes with 1 year quality guarantee. These are a good addition to anyone who likes DIY on mowers, or vehicles,etc.