Comoware Hex Shank Hss Step Drill Bit With Two Spiral Flutes And Impact Product Features HSS Titanium Coating: Our high-speed steel drill bits come with a titanium coating that ensures outstanding durability and sharpness. The coating reduces friction and keeps the bits cool during use. Spiral Flute Design: The spiral-flute design prevents metal filings from flying around and clears chips faster, allowing for smoother drilling without overheating. The split point tip is at 118 degrees to increase wear resistance. Widely Applicable: Our step drill bit can process different diameter holes, making it easy to drill through plastic, wood, plank, and soft rubber with low hardness countersunk. Suitable for home DIY and general building/engineering use. Hex Shank for Quick Change: Our drill bits feature a hex shank that fits easily and securely into all power tools, especially for locking into quick-change chucks. The hex shank also clamps more securely onto pistol drills to prevent slippage and shedding during rotation. Easy Storage and Lifetime Guarantee: Our drill bit has a case for easy storage. We stand behind all of our high-quality products and offer a no-questions-asked guarantee. If you're not satisfied, please contact us (through Amazon if past the standard return window) and we'll be happy to assist you. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!