Irwin 10311 Unibit11 7/8" 3/8" Shank Step Drill Bit USA Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates Single-flute cutting edge for greater control through steps Patented single-flute cutting edge gives the user a true round hole every time If you are on our eBay store, and are interested in more of our items, we do offer combined shipping! Please understand we cannot see the items in your shopping cart!! To receive a combined shipping invoice, please complete the following steps: Click the buy it now button in each listing for ALL of the items you want to purchase. Before you pay, send us an email requesting combined shipping. Once your request is received, we will combine your order and send you a corrected invoice. AFTER you have received the corrected invoice, you may pay for your order. For shipping outside of the contiguous US, or international shipping, please contact us. If you are shopping on our website at cripedistributing, this will all happen automatically!! If you have a question about one of our products, please email us or call us at (208) 424-3370. We check our email regularly, and try to get questions answered as quickly as possible. Much of our inventory is kept offsite from our offices, so if you have a question that requires us to get the physical item in order to answer it, please allow at least two business days for a response. Aeronca x 6