Rosnek Spiral Metric Tap Drill Bits Set with Protective Storage Case Stainless Steel Bits M3/M4/M5/M6/M8/M10/M12/M14/M16/M18/M20

HHS-M2 Hardness：HRC.68 M2(W6Mo5Cr4V2 High-speed steel) is the standard and most widely used industrial HSS. It has small and evenly distributed carbides giving high wear resistance although its decarburization sensitivity is a little bit high. After heat treatment its hardness is the same as T1 but its bending Strength can reach 4700 MPa and its toughness and thermo-plasticity are higher than T1 by 50%. It is usually used to manufacture a variety of tools such as drill bits taps and reamers. Description: Features: * High hardness(up to HRC.68) fast cutting wear high temperature. * Spiral groove is conducive to remove crumbs not easily broken tap. * Tap the crumbs into a spiral up chip evacuation it is more suitable for the processing of blind holes and sticky materials processing. * For hard matel tapping such as stainless steel aluminum alloy carbon steel copper wood PVC plastic and so on. Specifications: Material: HSS-M2 Type Size: M3: 3mm x 0.5mm M4: 4mm x 0.7mm M5: 5mm x 0.8mm M6: 6mm x 1mm M8: 8mm x 1.25mm M10: 10mm x 1.25mm M12: 12mm x 1.5mm M14: 14mm x 2mm M16: 16mm x 2mm M18: 18mm x 2.5mm M20: 20mm x 2.5mm