Sizes 3Mm - 12Mm High Speed Steel Taps And Round Dies Sizes: M3 X .5, M3 X .6,4 X .7, M4 X .75, M5 X .8, M5 X .9, M6 X .75, M6 X 1.00, M7 X .75, M7 X 1.00, M8 X 1.00, M8 X 1.25, M10 X 1.25, M10 X 1.5, M12 X 1.5, M12 X 1.75 For New Threads Or Re-Thread Damaged And/Or Jammed Threads. Plug Taps Are Used For Thru Holes