The Grey Pneumatic 4028D [4028D Grey Pneumatic - Amazon.com] is a 1-inch drive, 7/8-inch, 6-point deep-length impact socket. Forged from high-quality chrome-molybdenum alloy steel, it is designed for high-torque applications and includes an internal large bore for maximum bolt clearance. Here are the exact specifications of the socket Drive Size: 1 inch Socket Size: 7/8 inch Overall Length: 3.54 inches Hex Depth: 0.87 inches Weight: Approx. 1.79 to 3 lbs