Irwin 10 Piece Masonry Drill Bit Set Features Irwin 10 Piece Masonry Drill Set has an enhanced Carbide tip design which ensures durable & fast drilling in all masonry materials Its single flute design gives maximum space for dust removal & provides 60 faster dust removal than standard masonry drill bits which makes this one of the fastest & longest lasting masonry drill bits on the market The set is supplied in a smart tough case which has a sliding lock & rubberised grip which makes it resistant to knocks if accidentally knocked Each size is clearly identified & stored inside the case This masonry drill set contains 10 of the most commonly used sizes some of the most popular sizes have 2 drills used around the work site or home Contents 30 x 70mm 40 x 80mm 50 x 90mm 55 x 95mm x 2 60 x 100mm x 2 65 x 115mm 70 x 110mm x 2 80 x 120mm 100 x 140mm