When the big lug nuts on a tandem axle trailer or heavy equipment won't break loose with a 1/2-inch drive impact, you're either pulling a second truck around or rigging up whatever reducer you can find. This 1/2-inch female to 3/4-inch male impact adapter steps up your 1/2-inch drive gun to handle the larger 3/4-inch sockets you need for the big fasteners. Magnetic socket retention keeps everything seated through the impact cycle. Machined steel — not die-cast — so the anvil connection doesn't wallow out under repeated heavy torque cycles. This is what heavy equipment technicians and trailer service mechanics across northeast Nebraska and northwest Iowa keep in the truck for the bigger jobs. In stock at Crofton Lumber (Crofton, NE) and Akron Lumber (Akron, IA) — ready for pickup today. Stocked at Crofton Lumber and Akron Lumber.