Spectra Diamond Tools manufactures Single Point and One Way Type Diamond Dressers. Spectra Diamond Tools manufactures all types of Diamond Dressing tools, Resin and Metal Bond Diamond Wheels, Diamond Indentors, Diamond needle files, etc. Single Point and One Way Type Diamond Dressers have a single whole crystal diamond sintered at the top enabling better bonding efficiency. The size of the diamond depends upon the size of the grinding wheel, which has to be dressed. One way or throw-away is also the same type except that it is meant for one type use, the diamond being totally consumed and consequently it is low priced.