Mirka Basecut is the economical. high efficiency choice for sanding discs. P40, P60, P80, P120, P180, P240, P320, P400, P500 or P600 Grits. 15 Hole Vacuum Dust Extraction System. The are a host of productivity and efficiency features, including a high initial aggressive cut and a long working life span which ensures it's a cost effective choice.
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