Neiko 10197A Step Drill Bit Set | 5 Pc., 50 Sae Sizes Total, 1/8" - 1-3/8" | The NEIKO 10169A Step Up Drill Bit set is your all in one drill bit set, drill a range of different sizes with a single bit. Looking to expand holes or drill into metal, this drillbit in the shape of a cone has multiple sizes in one. Conical shaped bit that allows you to drill a variety of hole sizes without needing to change between bits. The tip of the drill bit drills the smallest hole and as you step or drill further down the diameter increases as you drill. 1pc of 1/4" Shank: 6 steps (3/16, 1/4, 5/16, 3/8, 7/16, 1/2") 1pc of 1/4" Shank: 13 steps (1/8", 5/32", 3/16", 7/32", 1/4",9/32"5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2") 1pc of 3/8" Shank: 9 steps (1/4, 5/16, 3/8, 7/16, 1/2", 9/16, 5/8, 11/16, 3/4") 1pc of 3/8" Shank: 10 steps (1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8") 1pc of 3/8" Shank: 12 steps Product Features HSS COBALT STEP BIT: Classic stepdrill bit constructed of high-speed steel with cobalt coating for drilling holes in plastic, aluminum, copper, stainless steel, and many other types of sheet metal. Also doubles as a hole expander. TWO FLUTE TRI SHANK: Two-flute design deburrs during drilling, clearing chips faster and allowing particles to escape for clean cut holes. Each step drill bit features a tri-flatted shank for a secure fit into power tool chucks, eliminating slip. MULTIPLE HOLE DRILL BIT: This versatile cone bit can replace 50 individual bits with just 5 pieces in one box. Drill a range of different sizes and holes with a single bit without needing to change between bits. INCLUDES: Four multipurpose dill bit in 1/4-inch shank and 3/8-inch shank and a red blow mold carrying case for easy convenience and storage in your car, garage or shop. 50 SIZES IN 1: 5 stepper bits included. 1 x 6 step bit (1/4? shank; 3/16? - 1/2?), 1 x 13 step bit (1/4? shank; 1/8? ? 1/2"), 1 x 9 step bit (3/8? shank; 1/4" to 3/4"), 1 x 10 step bit (3/8? shank; 1/4? ? 1-3/8?), and 1 x 12 step bit (3/8? shank; 3/16? ? 7/8?). 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!