I think the hammer is supposed to symbolize some pinko Commie faggotry, because the hammer and sickle. Phil has to prove what a dedicated...whatever he is these days...he is. It's just another prop for his identity games and power fantasies.This is a fascinating look into Phil's psyche. Not him, that's just the usual fat tard wearing a balaclava, shades and fingerless gloves indoors. No, what's really fascinating is the wall behind him.
Phil has a hammer on his wall. A goddamn hammer. Either he's so short of room he's forced to use the walls to store stuff, or, much more likely, Phil thinks his hammer is a super scary, deadly weapon that should be shown off to prove how tough and badass he is, and how well-prepared he is for a "home invasion". That anyone but a child could get a hefty punch, a blade, or a couple or four bullets into Phil before he could hit someone with a heavy and slow hammer doesn't seem to have occurred to him. The heavier the weapon, the longer it takes to lift and swing it, and a longer swing is needed to get any force behind it. Plus, if Phil lives in a tiny broom cupboard there's not going to be enough room to swing his hammer as a weapon.
There's also one of his beloved hand-drawn posters, featuring someone in military gear and a face mask, and carrying the red and black anarchist's flag. The poster reads "GRS surgery". Because optional cosmetic surgery to live out a sexual fetish, while fucking your body up and ensuring you'll spend the rest of your life taking big pharma's hormone pills is SO ANARCHIST.
There's also a poster dedicated to the M25, which is possibly the only poster he's ever made that's actually relevant - being as the M25 motorway has London-bound traffic in utter gridlock every day, fucking shit up in the capitalist mecca that is the capital of the UK. Or he could be talking about the Mexican gang, in which case the poster isn't relevant at all and Phil is talking crap yet again.
But with all this posturing masculinity spread all over the walls, where is your gun, Phil? Why don't you have it hanging over your bed, in pride of place, to show everyone just how scary you are? It wouldn't be because you don't actually own a gun, would it?