This flexible sanding block pack helps you get your surface in tiptop condition ready for painting, priming, undercoating, staining or varnishing It features 6 different grits - 60, 80, 100, 120, 180 and 200 - making it ideal for sanding a wide range of materials and surfaces to a smooth finish including wood, metal, plaster and more TRADE QUALITY ABRASIVE: the blocks are coated with high quality aluminium oxide abrasive that significantly outlasts sandpaper - the grains are self-sharpening for better durability and clog less to maximise your productivity ULTRA FLEXIBLE: the foam sponge core gives the sanding pads excellent flexibility, so as well as being ideal for flat surfaces they mould easily to curved or profiled shapes such as window sill edges, furniture, panel doors, architraves, skirting board, radiators, pipes, banisters, railings and spindles USE WET OR DRY: the sanding blocks can be used either dry like sandpaper or - unlike sandpaper - wet, which reduces sanding dust with no loss of performance COMFORTABLE WORKING: at a handy 10cm x 7cm (4" x 3") size, the blocks fit neatly into the palm of your hand, giving an easy grip and less fatigue over time - especially important if you've got a lot of sanding to do WASHABLE & REUSABLE: simply rinse under cold water after use to remove sanding dust and allow to dry thoroughly before next use