i think it was tempered glass bud. I'd been using a sraper for years with no probs at all. But it just "did" on this glass. Like i said, i dont feel too bad(although i admit i should) He was an obnoxious, horrible, tight git. I remember hearing this guy speaking to his mrs while i was there. I wouldnt speak to a "dead" dog like he spoke to her. And that was while i was there. God only know what he's like behind closed doors. Too much info, right? lol