This Universal mixed drill bits set comes with 100 pieces and can be used with wood, metal, plastic, brick and concrete block Universal Mixed Drill Bit Set comes with 14x HSS drill bits (1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8 and 10mm), 5x masonry drill bits (4, 5, 6, 8 and 10mm), 5x brad wood drill bits (3, 4, 5, 6 and 8mm), 3x flat wood drill bits (16, 22 and 25mm), 40x 25mm driver bits (2xPZ0, 2xPZ1, 3xPZ2, 2xPZ3, 2xPH0, 2xPH1, 3xPH2, 2xPH3, SL3, 2xSL4, 2xSL5, 2xSL6, SL7, H2, H2.5, H3, H3.5, H4, H5, H6, T10, T15, T20, T25, T27, T30 and T40), 12x 50mm driver bits (PZ1, 2xPZ2, PZ3, PH1, 2xPH2, PH3, SL4, SL5 and 2xSL6), 60mm magnetic bit holder, 8x nut drivers (4, 5, 6, 7, 8, 9, 10 and 13mm), drill diameter gauge, countersink (12.5x36mm), 4x hole saw bits (32, 38, 44 and 54mm), hole saw arbor, punch, 3x drill depth stops (6, 8 and 10mm), allen key (for depth stops) and plastic carry case Universal Mixed Drill Bit Set is a great mixed drilling set for various drilling applications Drill Bit Set coems in a handy carry case for easy storage Mixed Drill Bit Set has a straight shank for quick release