The top handle on my EMT shears keep breaking.
(Harbor Freight - Stainless steel, serrated "Multipurpose shears" # 36900).

Thanks smacorp for the handle. This size works great for me.

The bottom handle has not broken on my shears. I do not think this will work on the other side.

No supports are needed and the resolution did not matter.

Update
Added a v2 design - moved the handle a bit forward on the arm.
Be sure to use the correct insert for each handle design.

I put the shears into the handle, added some acetone, then added the insert.

Making sure the shears were completely closed, I let it dry overnight and have been using them since.