Craftsman 21-Piece Metric Combination Wrench Set, 58023 13 - Metric Combination Wrench Sizes: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20 mm 8 - Metric Combination Ignition Wrench Sizes: 4, 4.5, 5, 5.5, 6, 7, 8 and 9 mm Box end offers 12 points for more angles and reduces the swing needed for tight turns Open end delivers fast grab to work in areas with little clearance above the fastener head Clear markings make the right size easy to spot