Feathers: Brand new and high quality nickel bonded diamonds. These high speed diamond coated cutting discs can be used with your rotary tool to cut a wide variety of materials. Cut wood, glass, plastic, metal, marble, masonry, stone, concrete, and fiberglass. For use in tight places and for flush cutting. Specifications: Shank size 1/8" bore Disc diameter: 13/16" Material : Nickel plated steel Max Speed : 20,000 RPM Note : Add some water for coolant when using it. Package included : 10 x 50mm Diamond Cutting Discs 2 x Drill Bit Shipping 1.You can ask the seller about the shipments to other countries or higher quantity. 2.We are always working hard to ensure your package arrives as soon as possible. Please understand that some factors like weather, high postal traffic, and the performance of shipping companies are outside of our control. 3.Usually product Reaches after about 12-45 business days depending on destination.If you have not received your shipment within 45 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Refund or resend product will be offered if item still not received. 4.We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important. We ask you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns.It is impossible to address issues if we do not know about them!