They use the the hair from siberian huskies wound 1000 times around the bones of Siberian wolves. It gives that special flavour to the tone that is only what true heavey metal should sound like when your making christmas carols

and yes I'm being a smart ass
and now to be a little helpfull this is a link to one of the guitarists website, which happens to be myspace.
Dude honestly to get the exact sound of someone by getting their pups wont really help. you need their guitar amp setup and effects. Also when your hearing recordings thats also gone through mixers and other effects aswell as mastering. With all that in mind its virtually immpossible to match it exact. I suggest getting a high output pup, and that should do the trick.
Dimarzio super distortion 3 is great for high gain rhythm.
but good luck in finding out what he uses.
http://www.myspace.com/chriscaffery