The Grey Pneumatic 4034RTW is a 1" drive x 1-1/16" standard length, 6-point thin-wall impact socket. Key Specifications Drive Size: 1"Socket Size: 1-1/16" (Fractional/SAE) Length/Depth: Standard (Regular)Wall Profile: Thin-wall (TW), designed specifically to offer better clearance and easier access in tight or confined spaces. Configuration: 6-point hex Material: High-quality chrome-molybdenum alloy steel built to handle heavy-duty use with pneumatic and impact tools.