Material:42CRMO+50CRV
 size:10，12，13，14，15，17，19，21，22，
 24mm，ratchet:72-tooth
 The non-ratcheting end is a plum head and the ratcheting
 end is a toothed ratchet.
 Universal Spline Drive Works on 12-point, 6-point, Rounded
 6-point, Spline, E-Torx and Square Fasteners
 Ratcheting Flex-Head Box-End Gives Adjustable Access Angle
 Non-Ratcheting End for Breaking Loose Fasteners
 Extra long design for when you need extra leverage or for
 restricted access into awkward areas