The description says that the hole in the blade is a barbers notch. Never seen a barbers notch placed there so I think the guy is just talking rubbish, or am I mistaken?
http://www.ebay.co.uk/itm/Original-...ctables_LE&hash=item2570b24e18#ht_2240wt_1143
http://www.ebay.co.uk/itm/Original-...ctables_LE&hash=item2570b24e18#ht_2240wt_1143