Select-A-Bit 4 in 1 Multi-Socket SAB601 €¢ Replaces the four most common nut drivers with one tough tool. €¢ Telescoping action provides two socket sizes at each end. €¢ High-torque grip has textured, non-slip spurface. €¢ Tough, high-quality industrial steel construction. €¢ SAE socket sizes: 1/4", 3/8", 5/16", 7/16"