2ft long masonry drill bit (Fords Farm RG31)

Can anyone find a use for this giant drill bit? I don't know where it came from! Was it left in my garage by a previous owner? ... or left behind by a workman or a builder? I kept it for years 'just in case I might find a use for it' (but I never did)! Probably needs to go to the tip but not worth making a journey just for one item.

       
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