CO2 inflators are an underrated bit of kit. They’re cheap, light and way smaller than handpumps. Plus there’s the bonus of not having to pump away for half an hour to get half the PSI you need.
The Airtool is simple, small and easy to use. It’s important to hold the 16g cartridge by the supplied foam sleeve because it gets very cold as the gas expands and there's a very real risk of a cold burn.
The trigger action allows controlled inﬂating so you don’t lose all the C02 as you put it on the valve, and you can use anything left in the cartridge in the future.