The Grey Pneumatic 3120MD is a 3/4-inch drive x 20mm deep-length metric impact socket featuring a 12-point (double hexagon) design. It is built specifically for heavy-duty automotive, trucking, industrial, and construction applications where high torque and deep reach are required. Key Technical Specifications Drive Size: 3/4-inch square drive Socket Size: 20mm metric Configuration: 12-point deep length Material: Premium Chrome-Molybdenum (Cr-Mo) alloy steel Finish: Corrosion-resistant black oxide coating Length / Dimensions: 95mm overall length, 34mm outside diameter, and a 70mm bolt clearance depth