The whole body is made of aluminum, long service life. Good tool for engraving machine inverted board bakelite chamfering and trimming machine. Material: aluminum alloy CNC. Screw hole distance: 62x70mm/56x45mm. Color: Silver / Gold / Black. We believe our items are so outstanding. All products are quality checked. We will be happy to resolve any issues you may have in a cordial and friendly manner. But the items must be back in factory condition.