Sutton Tools Impact Taps are specifically developed for use with the high-torque output of an impact driver. Suitable for steel, aluminum, brass, cast iron, plastic, and nylon. Impact taps are ideal for routine maintenance, repair work and for rethreading where high accuracy and tolerance thread is not critical. Tapping with an impact driver is approximately 20 times faster than hand tapping - only three seconds to tap a hole! Not suitable for precision, safety or critical threads. For tapping up to 1-1/2 x diameter.Features: 20X faster - 3 seconds to tap a hole; 1/4" hex shank suits impact drivers; Straight Flutes suitable for through-hole tapping up to 1-1/2 x diameter; Intermediate lead suitable for through holes or blind holes where the thread does not need to go right to the bottom of the hole; Made from tungsten chrome alloy; Bright finish for general purpose applications, non-ferrous metals & plastics; Specifications Designation: N; Finish: Brt; Shank Form: A; Type: Straight Flute; Thread Form: M; Lead: Intermediate; Material: TCA; Max Cut Depth: 1.5xD; x: als; Standard: Sutton; Nut Tolerance: ISO 2 / 6H; Drill: 2.5; Pitch: 0.5; Size: M3;