As a full time EMT and Volunteer FF my perfect rescue blade would have the following. -Rounded/blunted serrated blade (handy for cutting rope, belts, heavy clothing)-Replaceable Carbide glass breaker (Tend to work better then steel glass breakers)-Strap cutter (Cuts light clothing faster and better then shears or a knife)-O2 wrench. (As a medic this is always handy, but not needed for a car knife) -High traction grip (blood, water, whatever I don't want to slip up on my knife)-Flow through design (makes cleaning after it gets contaminated easier) -Economically priced (so when I break it, and I will it will not break the bank)Have not found one that meets all my requirements... Yet
Here is a picture of the O2 wrench from my LM raptor, it is the hole near the base of the strap cutter. (Image removed from quote.)
Yeah they are simple tools, hell they could make the one hand hole into one on the rescue knife for all I care I just want one
The best "rescue knife" is the knife you carry all the time. Cutting seat belts or roof panels with my Spartan or Rajah 2 is easy. To break glass, I would use my SOG multi-tool. Removing clothes from a body with any open blade is dangerous! Emergency shears should be used for this. Strap cutters can snag on seams, causing further damage to the wounded area.