Flexovit hook & loop sanding discs are made from tough and sharp high performance aluminium oxide combined with a heavy paper backing makes this product extremely durable and long lasting They have 8 perforated holes to fit sanders with 8 dust extraction holes These tough and durable sanding discs with heavy paper backing for longer life are ideal for general purpose sanding and stock removal Hook and loop backing allows quick and easy disc changing to fit most brands of eccentric sanders Suitable for use on wood paint and metal Size 115mm 8 holes