Size:diameter 4.5 inch,bore 7/8 inch Material:Compressed Wool Felt Package include: 7 pieces wool felt polishing wheel pads Application:Suitable for polishing of metal, wood, glass,stainless steel,tableware, precision instrument, marble etc. Features:Smooth and bright polishing effect,surface fine finishing, best used with polishing compounds to produce a high finish on all dies and molds surface.