Uxcell Combination Drill And Tap Bit Set M3 M4 M5 M6 M8 M10 With 1/4" Hex Shank Product Details Specifications: Drill and Tap Bits: Bit size: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5. Can complete hole drilling, tapping, deburring and countersinking. One-step operation greatly saves processing steps and improves working efficiency. Quick Change: 1/4" (6.35mm) hex shank can be used on power tools more easily and securely. The shank has a tapered end. It exceeds the tap to prevent threads damage from over-drilling. Material Coating: High-speed steel taps features high hardness, wear resistance and durability. Bluing process is for corrosion resistance, capability, and long service life. Wide Applications: Drill tap bits can drill or tap accurately on wood, plastic, copper, brass, aluminum, iron.(Note: not work well with high hardness metal.) Self-centering point, do not need assistant center drilling or center punching. Easy to Use: Suitable for most hand electric drills, cordless drills, impact drills and other tap machine. Drill tap bits are engraved with accurate sizes for easy identification. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.