Flexovit Multi Material grinding wheels are engineered to grind a wide variety of general purpose building materials. Ultra thin grinding (UTG) has been designed to deliver precision, stability & comfort when grinding. Ideal for trades people or serious DIY. Multi Material wheels are designed to grind Multi Material wheels are produced with silicon carbide grain which produces a smoother, faster more versatile result. This wheel is designed to grind a variety of materials, if grinding a single material repetitively, always choose the wheel most suited to that application. Proudly Australian made. Depressed centre wheels may also be referred to as raised hub wheels.