Product Weight: 0.2 oz (6 g); Package Size: Length: 4.9 inches (125 mm); Width: 1.8 inches (45 mm); Height: 0.4 inches (11 mm); Package Weight: 0.5 oz (12 g); Material: WA Whetstone #150; Uses: Polishing metal, such as aluminum, etc.; Tip Size: Diameter 0.000 rpm (2 mm); Compatible models: Proxon mini routers 284 mm). 473