Amongst my collection of tool inserts I have a number of these. The tip shape / cutting angles look useful but I have been unable to find a suitable holder. Do any of you know what make/ type of holder they will fit?

The cross sectional sizes of the three different insert tips are:

3.1w x 5.2h x 16 long; 5.1w x 6.27h x 22 long ; and 8.12w x 7.22 h x 25 long and the 'key indent' on their bottom edges is 3.5mm diameter.

Any help appreciated as the tip geometry looks sharper and more conventional than many of the current inserts and and may therefore be better suited to the lighter cutting speeds and feeds of model engineering lathes.The V point (thread cutting) tips look especially useful.

and a smaller version of the original photo in case the file size was too large

Thanks (and apologies) all – now added to my album. Learning all the time!

Edited By John Paton 1 on 01/10/2018 10:15:36

Thanks Neil and Emgee, I had not seen that pattern on Sandvik before but can now see what type of holder they were designed for. It could be years before I find a T-max holder second hand but at least i know what I am looking for now.

Taking Neil's point I might make a holder and see how well they cut, but this might prove more effort than its worth!!