WW2 Australian Snake Bite Lancet issued to troops. I shall transcribe the instructions.

"The snake bite must be immediately opened with the Lancet and crystals rubbed into the wound at once. A little water or saliva added to the crystals renders them more efficacious"

Now these were given out as a very dubious remedy and would basically do nothing. So don't uses it. Has condies crystals on one side and a small Lancet on the other. Sold as the curiosity it is.