TPTK+Nut FD

[mscags]

.5-1 6MX

Hero is on btn w $105 and villain has me covered.

Folded to villain who limps two off the btn, I pop it to 4.25 with A[img]/images/graemlins/spade.gif[/img]K[img]/images/graemlins/heart.gif[/img] and he calls

Flop comes A[img]/images/graemlins/heart.gif[/img]2[img]/images/graemlins/heart.gif[/img]5[img]/images/graemlins/heart.gif[/img]

He checks and I bet 8 and he moves all in. What kind of range is he on here and is a call ever profitable against an unknown