Klein Tools Hex Key Adapter for Refrigeration Wrench Recessed Boxes It has a tab size

It has a tab size of 0

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Klein Tools Hex Key Adapter for Refrigeration Wrench Recessed Boxes It has a tab sizeAdapt any 1 4 Inch square wrench opening to 3 16 Inch and 5 16 Inch hex head sizes. This spring loaded ball bearing adapter locks securely into wrench. Fits Klein Refrigeration Wrenches 86938 and 68310 and provides an easy ratcheting action for hard to reach valves. Perfect for heating, AC, and refrigeration applications. Made in the USA.