ITEM NAME:M1-M3.5 Plug tap thread Mini HSS Metric Taper Combined Select Size Product Description: Model: Microcomputer taps Specifications: M1, M1.2, M1.4, M1.6, M1.7, M1.8, M2, M2.5, M.3, M3.5 Material: high speed steel Package Include: According to your Choose!.Specifications: M1, M1.2, M1.4, M1.6, M1.7, M1.8, M2, M2.5, M.3, M3.5. Material: high speed steel.