Kobalt 20-Piece Standard (SAE) and Metric Combination Ratchet Wrench Set. This 20 piece ratcheting wrench set includes the following metric and SAE sizes: 6, 8, 10, 12, 13, 14, 15, 16, 17, 18 mm and 1/4, 5/16, 11/32, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16 and 3/4-inch. 12-point box end allows work on 6-point, 12-point, square, star and some rounded fasteners. 90-tooth ratcheting end provides 4 of arc swing. Material: Chrome Vanadium Steel. Item Weight: 2.49 Kilograms. Item Package Quantity: 1. Head Style: Box End. Material:? Chrome Vanadium Steel. Item Weight:? 2.49 Kilograms. Item Package Quantity:? 1. Head Style:? Box End. Item Weight:? 5.48 pounds. Product Dimensions:? 19.25 x 11.75 x 1.45 inches. Measurement System:? Metric, inch. Date First Available: October 2, 2017.