Monofilament Crimpers - About 20 1/2" long. [$20]
They are very clean, like new.
The markings at the end go up to 3/16" (see last 2 pictures) and the maximum hole size is actually 3/8".
Used to crimp connectors to attach wire cable for fencing and other applications. Read about the use of monofilament crimpers in general here:
https://easypetfence.com/crimping-tool-for-monofilament-sleeve/
If I still have them, I will include for free 5 heavy metal green farm or garden T-Post fence posts 2 - 6' and 3 - 4'