Yesterday I walked into my local industrial hardware store to warranty a large proto screwdriver that the tip broke off of. Now keep in mind this was a 3/8" flat tip yellow handled screwdriver that I have been having for quite some time, I have never used it as a chisel or pry bar. I was using it to set the valves on an engine when the tip broke off while holding the adjuster. Well long story short the guy behind the counter told me he would have to wait for the proto tool rep to decide whether or not to warranty it and would call me back. I'm a huge proto fan and was just about to drop the money on a set of their red handled screwdrivers, but if I have to be worried about a tool not getting warrantied then I might as well spend my money else where. Unfortunately sears does not carry any sizes this big in stock, so that is not an option. I did have one guy tell me he tried warrantying some klein screwdrivers and they denied him cause there were plier marks on the handles. What have you guys found to be the most hassle free screwdrivers to invest in? Good or bad, they all break eventually with hard use.