Product Name: One-piece composite tap for drilling and tapping with hexagonal shank for mechanical use Product material: Two types of high-speed steel 4341 and high-speed steel 6542. The 4341 material is suitable for wood, aluminum, iron and other low-hardness materials. The 6542 material has high hardness and is more durable. It can be applied to steel plates and even thinner 304 stainless steel plates of about 2 mm. Scope of application: This product is suitable for rapid drilling and tapping. It is recommended to use it on a tapping machine. Pay attention to the operation method when using the electric hand drill. Excessive shaking and tilting will affect the tapping and even break the tap! ! ! High speed steel material, high strength, wear resistance, hardness High quality, durable 1/4" (6.35mm) quick change hex shank. 6 sizes are adjustable to perfectly meet your different needs. (M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5) Wear-resistant and sharp drill bits ensure drilling