I recently bought the Camelbak Skyline which comes with the tool wrap. The wrap’s got 3 zipped mesh pockets inside and I keep a multitool, zip ties, puncture repair stuff, tyre levers, chain links etc in. It closes with a quick release buckle-type thing which cinches down.
It’s good for keeping stuff together but any more than 2 bulky things in it like a multi-tool, C02 canisters and say a roll of electrical tape and you won’t get it to close.
I like it. Keeps all the medium-sized and little things together and you can easily transfer it between bikes/packs. No idea what it costs to buy separately to say whether it’s worth the price.