The Robert Sorby #845 1/2 inch (13mm) Ring Tool Blade is designed particularly for end grain hollowing. The dual bevels of the ring cutting tip permits hollowing of internal curved surfaces and flat bottomed vessels. Produces an unrivaled surface finish on end grain. It is ideal for such items as goblets and egg cups. This un-handled version permits turners to create their own custom handle. This High Speed Steel (HSS) Blade has a diameter of 3/8" and is approximately 8-11/16" long overall. England.