48-Piece Impact Socket Set Cr-Mo Alloy Steel SAE/Metric Heavy Duty Storage. 48-Piece Impact Socket Set. Cr-Mo Alloy Steel SAE/Metric Heavy Duty Storage. Strong and flexible Cr-Mo steel, expertly forged for strength and durability to handle high torque impact tools. Innovative radius corner design that reduces wear and increases torque by applying force to the fastener […]