Out of curiosity I ordered a 3" slitting saw ,I tried it out today very gingerly at first ,not believing this flimsy little blade would work . These things are very impressive ,I was totally surprised by how and what it would cut … Going to order a couple more in different od .
I also made a couple of table lock screws ,just mucking about . The threads are a 1/4 20 as the yanks would say ….
Need to make myself a decent knurling tool ,the one I have is garbage !!…

single pointed and they turned out ok … 
Smooth as silk 

Edited By sean logie on 22/10/2017 17:46:55
Edited By sean logie on 22/10/2017 17:48:07