Rhynogrip Plus Line Disc Grit40 - Pack of 10 High Flexibility : Adaptable to curves & contoured Surfaces Uniformity of scratch pattern : Optimum substrate preparation Clog resistant coating : Long lasting sanding Nylon grip backing system : Quick & easy to fit Applications: Heavy Duty Sanding Sanding / Preparation Fine Sanding Sanding for Blending Substrates: Old Paint Top Coats Gel Coat Wood Coatings Fillers Clear Coats Solid Surface Walls and Dry Walls Primers Fibre Glass Gel Coat Soft and Resinous Wood Suited for :  Autmotive Refinishing, Decorative, Composite Industries, Wood and Furnature.