hi can someone help?i have bought a set of pdr tools and a scrap door and was thinking of a pdr job here in my country.but no matter how i twist o push i just cant bring out a crease dent .i was wandering is whether the door metai was too thick for that make etc.can i ask for window the leverage comes from pressing against the glass while twisting the handle ,am i right?some of the tools i bought from the set is so thin and i was wandering can it push out a dent.further normally window access tools recommended should be how many inches in diameter thick? thanks