i always used heavy spanners for years, didn't like the feel of light weight ones, but tried it about a year ago when i was given one to borrow and liked it that much that bought it off him, its an IMN and just as good now as when i had it, couldn't go back to using heavy one now. Only draw back I find is that because the head is heavier than the shaft, it is prone to falling out of your belt when leaning over on the odd occasion, but you get used to it after a while and take it out before you do.