3/4" ridgid conduit welded to the blade. i put the condiut down into the blade (socket?) beat the socket closed and welded it in. kinda hard on the hands but no more breaking handles.
^ ^ ^ This but worse !! Grandpa had one that was thick wall pipe and man that baby was HEAVY . . . . you weren't going to break that handle!! Plus, it was first portable Work-Out-Gym as your arms, biceps, triceps and shoulders were in damn good shape quick when using that thing.
As a kid had a garden hoe that dad had replaced wooden handle with steel. Us kids fought over who had to use that damn thing to weed the 1 acre plot of green beens which were "summer crop" for dad to make extra money. At least we got "paid" something . . . 10 cents an hour . . big whoopee!
For modern tools, a quality fiberglass handle shovel is best tool for the job. If you're breaking these, you've got wrong tool for the job.