The Grey Pneumatic 3784D is a 3/4-inch drive by 2-5/8-inch deep-length 6-point impact socket specifically engineered to remove and install transmission, differential, and end yoke locknuts on a wide variety of trucks. Key Features & Design Extra-Thin Wall: Designed specifically to fit into the tight clearances of heavy-duty truck drivetrains without modifying a standard socket. Chrome-Moly Steel: Manufactured from high-quality chrome-molybdenum alloy steel and heat-treated for optimal strength and durability. High Torque Output: Built using "High Torque" drive technology, which transfers pressure away from the corners to the broader, thicker flats of the fastener, reducing wear and rounding.No Adapters Warning: Due to its extra-thin wall construction, the manufacturer explicitly warns not to use reducing adapters or larger-drive heavy impact tools with this socket to prevent cracking.