The Grey Pneumatic 3780D is a 3/4-inch drive by 2-1/2-inch deep-length 6-point impact socket specifically designed for removing and installing transmission, differential, and yoke pinion locknuts on a wide variety of trucks. Key Technical Specifications Drive Size: 3/4"Socket Size: 2-1/2" (SAE 6-point) Material: High-grade Chrome-Molybdenum (Cr-Mo) alloy steel Dimensions: Drive end width of 2.87", socket end width of 3.27", and a total length of 4.1"Weight: 3.75 to 3.8 lbs