DMT Machinist Sharpener fine grit Red DMT. This Knife Sharpener from the devoted craftsmen at DMT measures 4 3/8" x 7/8" with blue coarse grit and features 1" continuous diamond area specially designed with a machinist in mind. Don't explore mother nature without the DMT Machinist Sharpener Knife Sharpener. Specifications for DMT Machinist Sharpener: Manufacturer: DMT Sheath Material: Leather Features of DMT Machinist Sharpener Knife Sharpener: Measures 4 3/8" x 7/8" Blue coarse grit 325 mesh Features 1" continuous diamond area specially designed with a machinist in mind Comes with leather sheath Hang packaged Package Contents: DMT Machinist Sharpener DMT DMTWMF: Machinist Sharpener fine grit Red