This high quality tool set includes both metric and imperial size sockets, is manufactured from tough chrome vanadium steel, and is also covered by Clarke's 'Pro Tool' lifetime guarantee*. Also includes an extension bar (great for accessing otherwise awkward & difficult to reach places) and a 3/8" drive ratchet with an ergonomically shaped comort grip handle. *This Clarke Pro hand tool comes with a Lifetime Guarantee (excludes ratchet mechanisms where applicable) see product packaging for full terms and conditions.