The Martins Industries Impulse 1" Impact Socket Set, No. MX-S2, is designed for high-torque applications. Made for use with impact wrenches, these chrome molybdenum sockets deliver ideal performance and are able to withstand more torque with durability and strength. Suited for light and heavy duty trucks, the 1" drive impact set includes eight socket sizes, ranging from 21mm to 41mm. Comes in a sturdy case to keep everything organized for neat, efficient storage.