A friend of mine needs a 13 and 14mm tip centering tool. He has a hightower lathe so Im sure the tail stock is 3/8 or maybe 1/2 inch Im not sure. He used to have a porper tool and tried calling muellers and they said that thy purchased porper but wouldnt have stock until the new year. Any help would be appreciated. Hes a heck of a nice guy. His name us Jim Light and he lives in Wausau WI. Thanks again