Specifications: Material: high speed steel Size:M1, M1.2, M1.4, M1.6, M1.7, M1.8, M2, M2.5, M3, M3.5(Coarse thread) Quantity:10 pcs Weight:16g Package Included: 10 x Machine Hand Tap(Coarse thread) HIGH SPEED STEEL MATERIAL : These tap set adopting high speed steel with high wear and heat resistant, which is durable and has long service life. STANDARD THREAD DISTANCE DESIGN : Standard thread distance design, clear and tidy, no burr. APPLICATION : These machine hand taps are used for machining nuts or other common thread on the machine GOOD EXPERIENCE : With these machine hand taps, you will have a polished tapping experience with them 10 DIFFERENT SIZES FROM M1 TO M3.5 : There are total 10 pieces of taps in 10 different sizes from M1 to M3.5 that you can use for tapping various threads