Throughout Kettled, Irwin has his trusty courier bag with him. He produces a few useful bits and pieces from it. Questioned about the bag’s inventory, he says that everything in it can be bought from Amazon or Ebay.
So, what is in the bag? I thought I’d do a little browsing and draw up a list. I’m restricting myself to products available on Amazon UK.
Please note, unless otherwise stated, I do not own any of these products, have not tested them and cannot vouch for their effectiveness. I may still use them in a story, though. Links should redirect to your local Amazon, and some items available in Britain may not be available where you are.
Bump Keys
Lock bumping is a way of opening locks by jarring the pins out of position, then turning the lock whilst they leave it open. A more detailed explanation is given in the wikipedia article linked. This 24 key set is made to fit the most common locks used in the UK. The seller will only send them to ‘legitimate’ purchasers, but I’m sure Irwin could get around that.
Fire brigade master keys Master keys for communal doors, padlocks etc., so firemen can get in when needed. There was a point in Tiger (free when you join the mailing list) when Kay and Irwin could have saved themselves a lot of trouble if he’d been carrying them.
He may back these keys up with a drop key. This one includes a lift door key, for when he wants to play at being John McClane.
Lock pick set Bump keys can be noisy, and sometimes you want to be more subtle. You’d think lock picking sets would be illegal, but there are loads of them- and training booklets and practice locks– on Amazon.
Padlock shims Though, with time and a Leatherman (see below), it should be possible to make a set of these from a drink can.
Handcuff keys Okay, this wouldn’t be much use in the courier bag. If you’ve got to the point where you’re handcuffed, they’ve taken the bag off you. So this is a plastic handcuff key, good for a few uses, that could be hidden somewhere convenient. If you want to put it in plain sight, you can get clippy buckles with the keys concealed inside them.
Cable ties Everybody needs cable ties. They’re almost as useful as baler twine and gaffer tape. Irwin uses them as impromptu cuffs during the story. Cable tie cuffs, similar to the type used by the Police, are available. Amazon has them listed as sex toys, but I can only think of how much they could pinch. Pain does nothing for me, so no thanks.
Evidence bags Okay, not evidence bags, but freezer bags. But you could keep evidence in them to reduce the risk of contamination.
Leatherman Another item that probably wouldn’t be in the bag. Leatherman tools usually come with a belt pouch. They’re more for when there’s time to fashion a solution rather than one needed right away. I used to take my Leatherman Mini everywhere with me. Nowadays, it lives on my desk beside the monitor.
This is just what I’ve thought of today (or wrote into Kettled). I’m sure I’ll add to it over time. I’m trying to think of an urban version of the survival tins outdoorsy types can get as well.
Throughout 
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a few years down the line, getting mixed up in art theft and smuggling, forgery and murder. Again, Irwin doesn’t instigate any of the shenanigans but comes in to lend a hand, strictly off the books of course.