DMT Duo Sharp Plus DMT. This Knife Sharpener from the knife craftsmen at DMT is a 8" x 2 5/8" double sided two-grit diamond bench stone with a continuous zone for small and pointed tools. Don't venture outdoors without the DMT Duo Sharp Plus Knife Sharpener. Specifications for DMT Duo Sharp Plus: Manufacturer: DMT Handle Material: Rubber Blade Material: Rubber Features of DMT Duo Sharp Plus Knife Sharpener: 8" x 2 5/8" double sided two-grit diamond bench stone with a continuous zone for small and pointed tools Comes with Duo Base a black molded base that provides 2" knuckle clearance for ease of use Rubber feet secure the base and stone to your workbench Package Contents: DMT Duo Sharp Plus DMT DMTWM8FCWB: Duo Sharp Plus