"Improved mirror like surface finish and high strength alloy","Hi-Visibility - Identify socket sizes at a glance with our oversized laser markings, blue for metric","Opti-Torque - applies torque to fastener sides not corners - allowing more torque to be applied to fastener","Counter-Torque - Distributes the torquing stress uniformly throughout the socket extending socket life","Socket Rail - Color coded, unique spring-loaded ball allows easy socket removal and replacement 1/2" DRIVE 24MM METRIC 6 POINT DEEP CHROME SOCKET CD24M6A | Matco Tools