Which earth auger blade fits the Earth Auger 150 mm / 5 15/16 OEM Part No. 4404 680 2015? Does the earth auger blade that fits this earth auger have 45mm hole centre screw fittings?

I can confirm the blade for 4404 680 2015 Eath Auger 150mm is part number 4404 682 3104. https://www.lsengineers.co.uk/blade-stihl-part-no-4404-682-3104.html Unfortunately we don't have the blade in stock so would be unable to confirm the hole centre size. I can confirm it is suitable for the following Stihl Auger models: BT 106, BT 309, BT 121, BT 120 C