I tryed everywhere looked and looked for hrs. to try and figuer this one out. It will fit a 22" bar, i run a 20" so it works for me .But you could make it a bit taller and fit a 24".
Rich
Its not a toolbox, but I have found a convenient device to hold small things. It is a mesh bag that I had hanging on the handlebars of my DR field and brush mower. You can see it at http://www.countryhomeproducts.com/groundsbag.html
I currenly have it tied around my SMV triangle sign, which is directly behind the seat of my 2910. I can also hang it on the back of the seat and either remove the SMV sign, or let it hang into the well behind the seat so it doesn't dangle outside the tractor. I keep gloves in there, small tools, the rear PTO cap when I have my mower connected, and miscellaneous other small items.