I have been on their site , but can not tell which one it is at the moment .
I know it is on one of their 5" grinders , but as I tend not to get on the tools nowadays , and especially not for chasseing work , I am not quite sure which one it is !?
I do know from when I was more hands on , it was the daddy especially when it came to cutting a perfect box hole .
I am going down to work early this week so should be back on Wednesday night this week , I will have a look for it at the yard and if I remember when I get back home post the model number up for you .