Sealey AK3715M 15 Piece Drill Bit Set for drilling in Brick, Stone and Concrete The Sealey AK3715M is a 15 Piece Drill Bit Set suited to drilling in masonry. The drills are all made from hard-wearing Tungsten Steel for a long service life. They come in a robust storage case with rubberised corners to absorb knocks. The drill bits range in size from 3mm to 10mm and represent fantastic value for money. Features: Set consists of 15 tungsten steel masonry drills Popular selection of sizes Supplied in plastic storage box with rubberised, non-slip coating Specification: Contents: Diameter 3mm (x3), 4mm (x3), 5mm (x3), 6mm (x2), 8mm (x2), 10mm (x2)