what should i use to cut these down

got some second hand foor rests i want to cut down (remove pillion bits)

what should i use? or anyone i can give em to ?

just use a hacksaw but cut less of than you want and then grind/file to where you want em to be.

Angle grinder and/or a dremel for the detailed parts.

on second look if its just just those 2 lugs which hold on the pillion peg then a dremel will cut it off nice and you could sand it down with another attachment.