Metric Size: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5, with 1/4inch hex shank, suitable for electric hand drill, impact drill, bench drill, electric screwdriver and other tap machines.
Used for thick cast iron, thick steel plate, die steel, stainless steel, aluminum, alloy, iron, etc.