I regularly see lightard aka "heart pine" confused with heart pine .One is the center of the stump of soft pine and is used for kindling.The real heart pine is a structural timber which is unavailable anymore,except as salvage timber.I own a house framed in it.The studs may be worth more than the house.It wouldn't make a very nice handle,IMHO.Heat pine,I believe,gets its name from the tree type.It is also called hart pine(southern for 'hard') and hard pine.