This base is made from solid, natural granite. Four rubber feet are included. The Granite Base attaches to the sharpener with 1.5" 10-32 Flat Head Socket Cap Screws which are supplied with every sharpener. This base is pre-drilled to accept the Wicked Edge Precision Sharpener WE100, WE120, and WE130 Technical Specifications Weight: Approx 15 LBS - density can vary. Dimensions 12"x10"x1.25" 12" x 10" x 1.25" Polished Granite Base comes pre-drilled for mounting the WE100, WE120, WE130 or Pro Pack I Sharpeners. COLORS MAY VARY based on supply.