The GEARWRENCH 120XP‚Ñ¢ UNV Spline XL Flex Head Ratcheting Combination Wrench has a metric size of 10mm. 10mm 120XP™ UNV Spline XL Flex Head Ratcheting Comb Wrench If you are looking for a quality ratcheting wrench, this GEARWRENCH 86210 10mm 120XP‚Ñ¢ UNV Spline XL Flex Head Ratcheting Comb Wrench is the tool to get.