Apex®, 3118, Socket, Yes Impact Rated, Measurement System: Imperial, Square Drive, 3/8 in Drive, 6-Point/Hex Socket, 9/16 in Socket, 1-1/2 in Overall Length, 7/16 in Opening Depth, 7/8 in Drive End Width, 7/8 in Socket End Width, 6 Points, Standard Style, High Carbon Alloy Steel