5PCS M10*1.5 1/4" Hex Shank 4341 HSS Drill Bit & Screw Tap of MetricIt is suitable for drilling, tapping and cutting of light metal, aluminum, iron, thin wood board, plastic board and other materials within 5 mm and lower hardness. They are not suitable for drilling and tap in hard metals or thick metals.Complete hole drilling, tapping, durable and countersinking in one operation and greatly save processing steps and time costs, improve working efficiency. Recommended to use it on a tapping machine. Pay attention to the operation method when using the electric drillCan be used to tap various threads. including 6 SAE sizes: M3*0.5, M4*0.7,M5*0.8,M6*1,M8*1.25,M10*1.5,1/4inch hex quick change shank fit Electric hand drill, impact drill, bench drill,electric screwdriver and other tap machine