General description The 10Pcs 4 Inch Nylon Fiber Flap Disc Polishing Grinding Wheel is designed for use with angle grinders. These scouring pad buffing wheels are ideal for polishing and grinding various surfaces, providing an efficient solution for your DIY and home improvement projects. Technical specifications Size: 100mm (4 inches) Bore Diameter: 17mm Material: Scouring pad Color: Red Package Contents: 10 x Felt Discs Measurement allowed error: +/- 1-3cm