10Pcs Mini Thread Tap Bit Set, M1 M1.2 M1.4 M1.6 M1.7 M1.8 M2.0 M2.5 M3.0 M3.5 HSS Thread Tap Set [Material]The small taps are made of high speed steel (HSS6542=HSSM2), high hardness, anti-rust, has excellent for capability and durability [10pcs Metric Tap Size] M1 x 0.25, M1.2 x 0.25, M1.4 x 0.3, M1.6 x 0.35, M1.7 x 0.35, M1.8 x 0.35, M2 x 0.4, M2.5 x 0.45, M3 x 0.5, M3.5 x 0.6 With 1pc Wrench [Nano Blue Coating]Using the penetration process, the hardness and service life of the product are effectively enhanced, enabling you to finish your project faster. [Excellent Design]Standard metric tiny thread tap, sharp and cut accurate, no burr, provide rapid chip removal for efficient threading and smooth tapping [Application]Made with the standard of machine taps, so it can also be used for machine use, and has a better experience than normal hand taps. The nano blue coating is an enhancement.