The 5-Inch Hikoki Grinding Wheel is an abrasive wheel designed for use with handheld angle grinders or power tools that accept 5-inch wheels. Hikoki, formerly known as Hitachi Power Tools, is a renowned manufacturer of power tools and accessories. The grinding wheel is typically made of abrasive materials, such as aluminum oxide or silicon carbide, that are bonded together with a resin or ceramic material. 5-Inch Hikoki Grinding Wheel abrasive materials provide a grinding surface that can efficiently remove material and shape or smooth surfaces.