Bro, if your friend is seriously that bad at hitting his vein to the point where hes carrying around a snake bite kit, he probably shouldnt be shooting up in the first place. Heroin is too expensive to be wasting it away by missing all the time, my God I probably miss like 1 out of 200 shots and when I do start to miss I INSTANTLY notice and stop pushing down the plunger, and move to a different vein. Honestly something like this isnt something you should need to have on the ready, maybe its a sign from God that hes not supposed to be shooting heroin if he misses consistintly lol. I dunno man I get what your saying and all and it would probably be a little effective but I just dont see the point of IVing heroin if you miss all the time, he would probably be better off sniffing, plugging, or IMing the dope, you cant really screw up any of those ROAs other than IMing im not sure I have never done that and am not a IMing genius by any means, but you cant really screw up sniffing or plugging dope, maybe try suggesting that to him, from what I hear plugging it is as close as your gonna get to IVing it, I know if it gets to the point where I cant shoot dope in my veins anymore, plugging it would be my next option. And dont get so offended and mad bro, no one on here is trying to give you a hard time, some of us are very very knowledgable when it comes to the topic of shotting heroin and all we are trying to tell you is this snake bite kit probably isnt as much of a God send as your buddy thinks, and other than that fact like I stated before, this is something a successful IV user shouldnt even have to worry about having on hand. Anyway just my 2 cents bud. Otherwise if he is that determined to keep IVing dope than he should research on a proper shooting technique, Im not sure what his issues are if hes got veins that are hard to find or if he just isnt properly injecting correct but there is tips and tricks to all those issues with a little bit of research such as hydrating yourself before injection to get your veins a little more bulked up, or doing simple exercise such as pushups or bicep curls, and as fair as shooting techniques, he should be injecting at a 45 degree angle with the opening of the needle facing up as it goes in, maybe his pushing his rig straigh down at a 90 degree angle? Or pushing it in wayyy to flat like at a 10 degree angle? Not sure I havent seen your friend try to shoot up and I didnt fully read all the replies to this thread so i apologize if you already stated his problems with injecting. Anyway just something to think about, but if that snake bite kit is working for him all the power to him, but the point is you shouldnt have to have one, missing isnt something you just want to accept as a norm of IV use, it shouldnt happen all that much and all your getting is a lot of wasted money and wasted highs.