Snapped off at the HILT!

[ROIGuy]

Hey guys.. I've been using a relatively cheap FISKARS digging knife for the past couple of months but yesterday in this Chicago park, I was digging with it and pried a bit too hard on the plug and 'SNAP'... thing broke off at the hilt.

Can anyone suggest a really durable digging tool? I prefer the hand tools so I can get leverage on the plug. Pictured below is one similar to the one I had.
I liked it because it was fairly heavy weight and I had the impression it was fairly durable, but I guess I need something a bit tougher.
Suggestions welcome.

 

[Toecutter]

I use this and like it alot, I used the fiskar one for about 3 minute before snapping it off, this one is tough!!
https://www.ebay.com/itm/Nisaku-YAM...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649