Workpro 3-Piece Step Drill Bit Set, 1/4" Hex Shank Quick Change High, Metric Product Details WORKPRO Titanium Step Drill Bit Set, 3-Piece High speed steel along with titanium coating ensures outstanding durability and sharpness for plastic, aluminum, copper, stainless steel hole drilling Two-flute design provides faster, smoother, accurate cutting and prevents metal scurf from flying around for improved safety Quick change 1/4" hex shank (6.35mm)can be easily fit into power driver, drill and press drill A well-organized bag included to provide users with easy storage and transport Set includes: Bit #1 (5 steps): 4mm, 6mm, 8mm, 10mm, 12mm; Bit #2 (9 steps): 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm; Bit #3 (15 steps): 4mm, 6mm, 8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm, 26mm, 28mm,30mm,32mm 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.