The IB-3 looks unique, in that it’s formed around a central spine that also houses a slide on tyre lever-cum-chain tool operator.
The tool isn’t the most comfortable to use though as you’ll be gripping the tools rather than a metal frame. As mentioned, the attached tyre lever includes a tool to operate the chain tool.
A clever touch, but I was concerned that if the tyre lever broke, I’d also be unable to repair a broken chain, making the tool somewhat redundant.
Those concerns aside, the rest of the metal design is, as always from Park Tool, exceptionally well made and handsomely crafted.