Diamond Products make some of the best coring drills, cutting tools and grinding machines. In many cases their core bits and concrete blades are actually rebranded by other manufacturers and sold at higher prices. Many of their products are made in the USA. The company's products are broken into several divisons including: Core Cut - Concrete saws, masionry saws, concrete grinding, granite & marble cutting and speedicut gas saws. Core Bore - core bits, hand held core machines and coring rigs. Tyrolit Construction Abrasives - metal cutoff wheels, grinding abrasives, flap wheels and sanding products.