Life Time Warranty and made with high grade quality chrome vanadium steel. ISO & DIN International World Standard quality. 3/4' Drive Metric & SAE Socket Set. Sizes range from 22mm to 50mm Metric and 7/8' - 2' SAE. Ideal for any mechanics workshop for the trucking or agricultural industry. If you are after reliability in a top quality kit, you can't go past the Genius World recognised brand.