Semi-flexible
 discs can be used instead of depressed-centre grinding wheels and 
sanding discs. The flexibility of the product leads to improved 
performance as it easily works around contours, requiring limited 
pressure to be applied making it easy to use. Semi-flexible discs should
 be used with a suitable back-up pad.
Application.
 Ideal for use on marble, granite, concrete, fibreglass and 
cast iron. Excellent for cleaning the hulls of ships and boats.