The Z-Rex from Leatherman is a lightweight, easy to use multi tool from the emergency series.
It has a Tungsten Carbide glass breaker, a 1/4" Hex Wrench, a oxygen tank wrench, and 440C cutters, which are replaceable.
It has a finger hole built in as well, and an ergo grip so you can have a firm grasp on the tool, even when doing intense tasks.
If for any reason you're unsatisfied with this product, it comes with a 25 year warranty. This product also comes with a MOLLE sheath.