Diamond Drill Bit Set, 1Mm 1.5Mm, 2Mm 1.5Mm, 20 Pcs., 4 Sizes, Compatible With Product Features Premium Quality Set of Total 20 pcs. 1mm (5 pcs), 1.5mm (5 pcs), 2.0mm (5 pcs), and 2.5mm (5 pcs) Twist Diamond Drill Bits - Compatible with Dremel and Other Rotary Tools Perfect for Jewelry Design Necklaces Earrings, Pendants, Bracelets with Sea Shells, Beach Glass, Rocks BONUS INCLUDED 4 Different Sized Collets Compatible with DREMEL for Drilling Clean Holes in Fused Glass, Gemstones, Rocks, Ceramic, Porcelain, Gemstones Compatible with Dremel rotary tools, electric, cordless hand drills, upright drills, flex shafts, and others. Cooling is important. Keep the hole you're cutting constantly bathed in water. You can feed water to the drilling spot, always keeping it wet. Or you can submerge the whole piece in water in a plastic container. 4 Brass Collets Compatible with Dremel INCLUDED 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!