ITEM NAME:10Pcs Diamond Cutting Disc Saw Blade Grinding Wheel Set Rotary Tool Circular Descriptio n Feature: Brand new and high quality. Made from strong carbon steel, durable and firm. Ideal for cutting hard materials like wood, plastics, laminates , aluminium, various metals ,precious stones, jade ,etc Suitable for use in carpentry and crafts. Material:diamond,carbon steel Disc Size:20mm Thickness: 0.6mm Hole diameter: 3mm Color:Silver Notes:It is manual measurement, there may be 2-3mm error. And item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. hope understand. Package included: 10x Diamond Cutting Discs 2x Mandrels High quality buy, happy buyï ¼ 10pcs 20mm Mini Diamond Saw Blade Cutting Discs for Drill Rotary Tool.10pcs 20mm Mini Diamond Saw Blade Cutting Discs for Drill Rotary Tool. We'd like to settle any problem in a friendly manner. 10x Diamond Cutting Discs. Material:diamond,carbon steel. Disc Size:20mm. hope understand.