In this photo, Dave Murray can be seen using Hot Rails pickups. This is confirmed in [this article](http://www.seymourduncan.com/blog/backstage-pass/iron-maiden-and-seymour/) on Seymour Duncan's official website. It says, ''Dave Murray uses a Strat with Hot Rails pickups in all three positions'more
A very awesome pick up indeed. I've heard people have felt its a bit dark and can be muddy sounding but I personally have never had that problem in my strat for the shortish time I used it in there. I still have it waiting for when I buy a new strat as it has been replaced by a SH-4 JB. Very crunchy clean tone indeed and very very mid range orientated, just sounds awesome to me. Great bass response and the highs aren't too over the top or piercing like some pick ups can be in my opinion. I used it with a coil tap so if I wanted to have that more traditional strat tone I could do. Cleans up pretty good to when you roll of the volume. If you want to do anything from the heavy alt rock of the 90's, well grunge really to stuff like maiden etc. excellent pick up
I took interest in this particular pickup when I saw a video on youtube demonstrating the "djentability" of a strat against an Ibanez 8 string. The video has since been taken down, much to my disappointment. Surprisingly the strat turns out to yield a more pleasant tone and I decided to give it a go. I was fortunate enough to find a steal of a deal on the second hand market (about 35 USD) so I bought it and installed it onto the bridge position of my Squier Affinity Strat (note that this is an earlier incarnation of the affinity series so the quality is roughly equivalent of that of a Squier standard).
The result was within my expectations - high gain, beefy and mid-rich tone distinct to the rest of the pickups on the guitar (both being single coils). When engaged, it has a significant volume increase which some may find bothersome, but that is only reasonable when you pit a high output humbucker against cheap factory single coils. Despite being great for rock and metal tones, the pickup could be a little bland. It lacks a lot of dynamics, and the clean tend to be a bit compressed and duller than that from a single coil.
Then I switched to position 2 on the pickup switch, which was when I discovered the tone I've been searching for several years. Crunchy, not too full sounding and touch-sensitive, with the sensitivity of a humbucker but the clarity and snap of a single coil. On lower gain settings - whether it be lead or rhythm - this combination shines. It's crunchy, bitey and....well it's pretty hard to describe, but I really can't recommend it more. Oh right, and slapping is strictly mandatory on that combination. It's slap heaven.
Anyways, this is a very solid humbucking pickup aimed towards rock and metal players who want a thick sound. Blend it with the middle pickup if you have one. You'll be surprised.