Wright Socket, Deep Length Shape II, Impact Rated, Metric, Square Drive, 1/2 in Drive, 20 mm Socket, 82.55 mm OAL, 63.72 mm Opening Depth, 30.16 mm Drive End Width, 30.16 mm Socket End Width, 6 Points, Alloy Steel, Black Oxide. Wright’s Wide Range of Ratchets Meet Your Every Need: Double-Pawl Ratchets in 3/8 in and 1/2 in Drives Provide Ruggedness, Extra Strength, Durability and Fine Tooth Action. We Also Have The Handles and Attachments You’re Looking For- From Extensions and Spinners to Universals, Flex Handles and The Exclusive Twin Flex.