The Foreman Machines Octo-Clamp gives the ability to secure a wide range of material sizes on CNC Fixture plates. Each side of the FM Octo-Clamp is a different distance from the center of the locking bolt, simply turn the clamp that comes closest to your material and tighten the 1/2 inch bolt. This clamp was specifically made to work with a Saunders Machine Works fixture plate, but will work with a variety of fixture plates and custom fixtures.