ITEM NAME:5pcs 50mm Diamond Cutting Discs & Drill Bit For Rotary Tool Glass Metal I9M1 5pcs 50mm Diamond Cutting Discs & Drill Bit For Rotary Tool Glass Metal I9M1 BRAND NEW 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. color: Silver Material: Nickel plated steel Shank size: 38mm Disc diameter: 50mm Max Speed: 20,000 RPM NOTE: Please add water for coolant when using diamond tools. Package Contents: 5 x 50mm Diamond Cutting Discs 1 x Drill Bit Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.