The M7 ME382 lets you attach a 3/8” female socket head to an air impact wrench with a 1.4” female drive. The key to making this happen is its 1/4” male drive. This fits securely into a 1/4” female socket on an M7 air impact wrench. This quickly turns your 1/4” pneumatic ratchet wrench into a 3/8” wrench. This Chromium-Molybdenum socket resists corrosion and handles the high-torque from M7 air tools. Want to add some convenience to your 1/4” air impact wrench? Shop JB Tools and get the best price on this M7 ME382 impact socket adapter. A ball lock pin is another feature of this M7 impact socket adaptor. When inserted into the tool, the ball bearing gets pushed inside the shaft. Once fully loaded, a spring mechanism pushes the ball bearing back out of the shaft and into the host tool. This provides a secure lock between the socket and the tool. To remove it, simply press a button that pushes the ball bearing back into the joint's shaft. This releases the lock and allows you to pull the socket free.