The Grey Pneumatic 3043UM is a 3/4-inch drive x 43mm metric universal impact socket designed for high-torque heavy-duty mechanical applications. Technical Specifications Drive Size: 3/4 inch Socket Size: 43 mm Configuration: 6-Point hex Socket Type: Universal swivel / jointed Length: 115 mm Weight: 1.9 lbs Material: Chrome-Molybdenum (Chro-Moly) alloy steel