Taps and dies (metric and imperial systems), with tools Metric system: Diameters from M3 to M12 3x0'5 - 3'5x0'6 - 4x0'7 - 5x0'8 - 6x1 - 8x1'25 - 10x1'5 - 12x1' 75 Imperial system: Ø1/4 5/16, 3/8, 7/16, 1/2, 1/8, 1/4 Contains: 7 metric and 7 imperial males. 7 metric and 7 imperial dies. 13 drill bits: 2'5 - 3'3 - 4'2 - 5 - 5'5 - 6'8 - 6'9 - 8'5 - 8'8 - 9'9 - 10'3 - 11'4 - 11 '8mm. 5 screw extractors. 2 male turners. 1 die holder. 1 thread gauge. 1 punch. 1 x screwdriver. UNF and BSP thread.