The Grey Pneumatic 3768D is a professional-grade 3/4-inch drive x 2-1/8-inch deep-length truck pinion locknut impact socket. It is specifically engineered to remove and install transmission and differential end yoke locknuts on a wide variety of trucks. Key Technical Specifications Drive Size: 3/4 inch Socket Size (Hex): 2-1/8 inches Socket Type: 6-Point deep impact socket with an extra-thin wall design Material: High-strength Chrome Molybdenum (Cr-Mo) alloy steel for maximum durability Dimensions: 4.12 inches overall length, with a 3.00-inch bolt clearance depth and a 1.02-inch hex depth Weight: 2.9 lbs