toller wrote:
I have a Delta JT360. In HD today I saw a set of Ridgid knives for $12.
Since the Delta knives are $45 (I have a set on order from Amazon) it seemed
like a good deal.

They are a bit thicker, wider, and longer; [snip]

Don't do it. And you can ask me how I know this (DAGS on the rec, my
name and jointer). You don't want those suckers coming out and flying
about or tearing up the table and the guard. Take a look at
http://freud-tools.com/freudjoinkni.html or DAGS for jointer knives to
find something the same size. If not, spend the bucks. [full stop]
mahalo
jo4hn