This Erbauer mixed drill bit set comes with 100 pieces and can be used with wood, metal, plastic, brick and concrete block Erbauer Mixed Drill Bit Set includes 5x carbide tip masonry drill bits (5, 5.5, 6, 8 and 10mm), 13x HSS drill bits (1.5, 2, 2.5, 3, 3.2, 3.5, 4, 4.5, 4.8, 5, 5.5, 6 and 6.5mm), 13x brad point wood drill bits (3, 3.2, 3.5, 4, 4.5, 4.8, 5, 5.5, 6, 6.5, 7, 7.5, 8mm), 3x flat wood drill bits (13, 16, 19mm), 1x countersink, 8x nut drivers (4, 5, 6, 7, 8, 9, 10, 13mm), 40x 25mm driver bits (PH0, 2XPH1, 5XPH2, 2XPH3, PZ0, 2XPZ1, 5XPZ2, 2XPZ3, T15, T20, T25, T27, 2XT30, T40, SL3, SL4, SL5.5, SL6.5, H2, H3, H4, H5, H6, SQ1, SQ2, SQ3), 10x 50mm driver bits (PH1, PH2, PH3, PZ1, PZ2, PZ3, SL4, SL5, SL6.5, T20), 1x screwdriver handle, 1x 60mm magnetic bit holder, 2x screw starter, 1x retractable knife, 1x 5m tape measure, 1x torpedo level and plastic carry case High specification mixed drilling set for high performance drilling applications Carbide tip minimizes wear and increases durability. 135 degree split point tip for metal drills and recommended for cooler operations and stay sharper for long Easy to use. Hard case provides secured storage and organization Magnetic universal holder for fast bit changes and a reliable screw hold in the bit. 6542 fully ground titanium metal drills, 40Cr with YG8 automatic welding masonry drills. Straight shank