Ask a QuestionSpecification: Material: High Speed SteelSize: M3/ M4/ M5/ M6/ M8 High hardness, fast cutting, high temperature wearSpiral groove is conducive to crumb removal, not easy to break the tapTap crumbs for spiral up chip evacuation, it is more suitable for processing blind holes and sticky processing materialsApplicable workpiece: tensile strength 750N/mm2 Or less low carbon steel, copper, aluminum, magnesium alloy; Bonding Strength 600 - 900N /mm2High Carbon Steel, Alloy Steel, Bronze, etcPackage Included: 5pcs x Flutes TouchNote: The error may be 2-3mm due to manual measurementItem color displayed in photos may be showing slightly on computer monitor since self-payment monitors are not calibrated1. We accept Alipay, West Union, TT. All major credit cards are accepted through a secure payment processor escrow.2. Payment must be made within 3 days of placing the order.3. If you are unable to check out immediately after the listing ends, please wait a few minutes and try again, payments must be completed within 3 days. Shipping1.