Iron Rock diamond hole saws, pool plaster disc, and bullnose tile blades and professional quality tools. Since 1981 Iron Rock has set the specification of how a tool is to perform. Not the price. After years of experience, Our specifications have changed with new products brought to the market. Our turbo continuous rim hole saws, clear radius bullnose blades, and noncorrosive pool disc. All Iron Rock Tools are developed for performance with cost as a secondary factor.