The Irwin Granite Masonry Drill Bit in 3.0mm diameter x 70mm length is the perfect choice for precision drilling in smaller diameter applications. This compact size is ideal for fixing lighter brackets, smaller rawlplugs, and delicate mounting work in granite, concrete and natural stone where accuracy is paramount. The extra hard, thicker carbide tip on this 3mm bit enables you to drill up to 40% more holes than conventional masonry drill bits, whilst the rounded cutting edges deliver 50% more a
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