Looking for Answers about Northern Industrial Deep Well Impact Sockets - 1/2in. Drive, 29-Pc. SAE & Metric Set?

Impact sockets are forged from high-quality chrome molybdenum alloy steel for durability and superior strength. Patented sidewall drive sockets apply force to the walls of the fastener instead of the points, resulting in longer fastener life. Laser-etched, hi-visibility markings allow for easy readability. Meets or exceeds ANSI and government torque performance specifications. Drive (in.): 1/2, Pieces (qty.): 29, SAE Deep Well Socket Size - 1/2in. Drive (in.): 7/16, 1/2, 9/16, 5/8, 11/16, 3/4. 13/16, 7/8, 15/16, 1, 1 1/16, 1 1/8, 1 1/4, Metric Deep Well Socket Size - 1/2in. Drive (in.): 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 26, Material Type: Chrome Molybdenum Alloy Steel, Flip Impact Socket (in.): 3/4 x 13/16, Flip Impact Socket (mm): 19 x 21, Extension Length (in.): 3, Case Included: Yes