This Action Square Drive Socket 1/2" x 20 mm delivers precise fit and durability for hexagonal nuts, featuring a 19 mm wrench depth for secure engagement and efficient torque transfer. Its 78 mm length and robust construction make it ideal for professional impact screwdriver use. Key features: - Connection size: 1/2 inch square drive - Socket width: 20 mm - Wrench depth: 19 mm for deep nut access - Length: 78 mm for extended reach - Suitable for impact screwdrivers with enhanced surface protection