The credit-card sized scuba tool has the usual array of fittings to let you remove and replace ports and assemble and disassemble hoses, but it also, according to the maker, enables you to reset intermediate first-stage pressure and adjust the second-stage orifice, the common causes of dive-cancelling freeflows. These features are said to set the Pandora Tool apart from other multi-tools and to make it especially useful for expedition divers. The stainless version costs £50, and in titanium it will set you back £70.