Recently Ken has made a variety of sizes upon request including pretty common 310mm, huge 400mm and a tiny 220mm model. Please contact us with any unusual requests as the steady rests can be made to order whatever size you like. We don't recommend anything over 400mm as the costs and weights become unmanageable - and remember that whatever the size of the lathe, you need a steady rest which is smaller than you swing. It is easy to use blocks to raise the turning centre of a steady rest but impossible to lower it.