WE use it in our area to put brands on cattle. Just the opposite of heat but will burn the hell out of em and when healed the brand if white. I also have some in the semen tank and that will sure make it small and VERY brittle. If you drop it after it's been in the juice it's broke. You use a styrofoam container and place the item you want to shrink in the container and pour nitrogin in it and cover. Won't take long but you do need a tank. Seems like it's 212 deg below sea level.