This tool is not OEM, but is identical and serves the same purpose.
This tool allows the OEM bolt to thread in and would tighten against the MD998769 before it bottoms out in the crankshaft, allowing the engine to be turned without damaging the roll pin or crankshaft. This tool has a relief hole for the alignment pin on the sprocket. It can be used if no sprocket is present as well.
This tool should fit all 6G72 & 6G74 models, plus a wide range of others. Please check message me if the fitment is in question for your engine.