Review on Circular Blade Sharpener Rotary Grinder by John Brazington

After much contact with the seller I received this picture showing adapters with arbor size information that appear to come with this sharpener. Picture shows 20mm, 22mm, 25mm, 30mm and 40mm adapters. A NOTICE. I have never bought or used this machine. Depending on the adapter sizes available, my boss may or may not buy one. I would like to know where I can buy English adapters. The 12" blade has a 1" 25.4mm hole so a 25mm adapter could fit. The 10" blade has a hole diameter of 5/8, which is 15.875mm, so we're out of luck here.