I routinely go to various pawn shops when I'm out of town "just to look".
My finds have included NIB Milwaukee Sawzall, NIB 1/2" Drill, stuff that looks like it went out the back door of a Lowe's, Home Depot or some ex-wife's divorce settlement.
I strongly suspect some of these items at some point were either shoplifted and pawned or stolen out of someone's truck.
I've seen folks come in with tool to pawn and could tell by the way they were holding them that they had no idea what they were doing.
I've been the victim of a couple of tool thefts a few times so about 25 years ago I started marking my tools, tool boxes, shovels, etc.
I'm not opposed to lending my tools and I've gone on some church mission trips and have done Habit so I really wanted my tools to come home with me. Marking them has proven to be the way to go.
First thing I did was have a mylar stencil made with my name. I've got one in 1/4", 1/2", 1" and 3". If I have a tool, I spray paint my name on it. I use yellow paint because that is what I've always used. If yellow won't show up, I use flat black. - can it be sanded off? Sure. Can it be removed with gasoline - maybe. BUT - petty criminals usually are scared away from stealing stuff that is easily identified.
I always figure if someone steals my tools and heads to pawn shop then they're going to have to spend some time removing the name.
All my tool boxes are steniled with the 3" name stencil. You can read it from the across the street. I stencil all 4 sides and the top. I want to send the message that this is my stuff and just leave it alone.
For my wooden handle tools I get some blue painter's masking tape and paint a nice 1" wide stipe around the handle in yellow or orange. I mask it up because it looks better. I've just done the spray line but I like the clean line better.
I have engraved some of my tools but I'll admit that at times I get too lazy to do this.
My brother and other tool freaks tease me about the stencil but I started giving them for Christmas presents and folks use them. The last batch of them I found on the internet. Get the mylar one because they last a long time (some of mine are 15+ years).
If if own it, somewhere it has my name stenciled on it. I use the biggest stencil I can so it stands out.
As for screwdriver's I use the tape and do a strip up by the handle (not on the handle) on the shaft.
I've not come up with good way to do sockets.
When I buy a new tool the first thing I do is stencil it.
I've not had a theft since I started doing the marking and I've found that I generally am able to keep up with my tools.