General description Uses HSS-M2-Co material, which is significantly more durable than 4241 and 6542 materials. This drill bit is designed for various applications, including drilling through steel plates, even 304 steel plates, with thicknesses ranging from 2 to 2.4 mm. The lifespan of the drill bit is 5 to 4 mm, which is 10 times longer than standard taps, ensuring better performance and longevity. Technical specifications Material: HSS-M2-Co Type: Rotary drill bit tap Shank: 1/4" (6.35 mm) hex shank Sizes: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5 Drilling angle: 118° Package included 6 pcs tapping drill bit