i'm a Cutco rep, i'll do my best to answer all of your questions. i have this knife myself, and it's my favorite in my extensive collection of hunting and other random knives. if it's damaged or needs to be sharpened, just send it in, and they'll always fix it or just give you a new one. the DD edge is a unique blade edge that only Cutco uses b/c we're the only ones that can afford to do it, lol. basically it's a way to have the clean cut of a straight edge, but to also protect the edges from dulling on hard surfaces. it involves having 3 different straight edges cutting in 3 different directions in between every little protective point. you CANNOT sharpen it yourself. but if you have your receipt it'll have the number of the office the rep was from, and you can call them. most of us higher up sales reps have special sharpening kits and we'll come right to your house and sharpen all of your Cutco for you. if you dont wanna bother with us, you can just mail it in, and they'll take care of it. you'll have it back in about 2 weeks. all of our blades are made of high carbon surgical stainless steel, so it doesn't rust pit or corrode like regular stainless doesn't, but it keeps a good edge like a carbon blade. our handle is made of thermo-resin, which is HIGHLY resistant to chipping, cracking, melting, and breaking in general. and is completely non-porous so it wont absorb any water or bacteria, like the wood handles on most hunting knives. and bone handles crack easily and lose any color they might have on them if they get hot and wet (most of mine have). point is, i HIGHLY recommend it to any hunter that's looking for a knife. it's won a few awards by the way. let me know if you have anymore questions.
