herrsavage, that 1 looks like it can be saved. there is 3 ways in which i can see. (1) it looks like there is enough metal sticking out to get a grip with some plies but before you go trying straight away, you will need to heat it up. over the gas cooker will do fine. hold in in the heat for about 30 sec and give it a gentle turn. if it still doesn't want to turn, heat it again and this time while it is hot, grab a tooth pick and run it under water. hold the tooth pick on edge and let a single drop of water drop onto the broken screw.place two drops on the screw quickly then try with the pliers again..........hopefully it should be free. (2) drill a small hole in the center and use a thread extractor.(easyout) (3) if you have access to a welder you can tac weld a piece of scrap metal to the end of the screw. the heat from the tac should free any internal binding and should screw straight out. hope this helps. goodluck!