I found this tool in a relatives garage when he passed away. It has a leather sheath and some writing on the back. It looks like it was never used. What the heck is it?

Nail and staple puller

^^^^^What he said! ^^^^^^

Its obvious, thats a Swiss Army edition pig castrator.

Also works quite well as a pig castrator.

Entry tool.

Fire depts use them a lot. For entering buildings and motor vehicles, and anything else they need them for.

DEFINITELY a pig castrator!

Looks home made.

next time use the cross-word section of the paper and there will be more views,

yup small entry tool a lot of the firemen carry them in their turnouts

they call them Halligan type

you can pull a lock cylinder , , pop a dead bolt face , and pry a variety of doors open
the bigger version is 24 , 30 , 36 or 42 inches

I would say the same, but the ones I am familiar with are somewhat bigger.

Definitely a Haligan tool. Carried by Rescue personnel. A Great tool multi purpose.

yup but they sell a mini https://www.thefirestore.com/Fire-H...JS6uh2pNe2tpjZ0C8nWNb51nNz4aAsElEALw_wcB

big ones https://www.thefirestore.com/Fire-Hooks-Unlimited-Pro-Bar-Halligan-Type-Forcible-Entry-Tool

lots of good uses of the mini as well and if everyone is carrying one it means less running back to the truck

Yup , looks like a version of a Halligan tool.

To the OP , try to research the exact brand/manafactuer online , some if these can get spendy and cost $200-$300 , not a cheap tool. Built to last and take an incredible beating daily without fail.

Halligan tool, used for forced entry. Firefighters and cops use em. Many different ways to use them based on door swing, lock type, etc.

for when you loose your house key....

Sandman must have the pocket model

trap stake puller
just

its a halligan tool for aircraft wrecks. we keep them at all landing zones and heli spots for helicopters . they come in a kit that has hacksaw,two small sized axes insulated cable cutters and seatbelt cutter. All used to break the aircraft apart to get the people out.
I will try and get some pictures or the kit and tools tomorrow.