I make mine light enough for me to toss out into the water .....without me going in head first with them. :)
The frames are made from rebar and then I cover them with hardware cloth or rabbit wire.
I use stainless steel wire to attach the hardware cloth to the frame.
There are wire handles on each end of the trap. Attached to one handle is a long rope.... I tie the rope to a rod or large stick.
I bait the trap, toss it into the water and plant the rod (with the rope attached) into the ground.
When ready to check the trap, I pull it in with the rope.
The crawdads climb into the cones, drop down into the bottom of the trap to get to the bait...then they can't get back out.
You can make them any size you need.
I use these traps for crawdads in the spring and to harvest my shrimp in the fall. They work great!