Think the confusion occurrs as the D1 is left hand and D2 is right handBought one from eBay bit like this one
http://www.ebay.co.uk/itm/LAND-ROVE...hash=item3a7f0645b6:m:miVFKIlO8m-ywvlm1BJK-hg
By the way it's a standard right hand thread, seems to be some confusion about this.