ITEM NAME:60mm Grinding Wheel Metal Cutting Disc For Rotary Tool With Arbor Shaft Features: 100% brand new and high quality. Made of powder alloy hot forming, high hardness, abrasion resistance, good impact resistance. It's dry wet amphibious,small slot and high shapeness. Perfect for cutting all kinds of metal, gem, jade, etc. Specification: Material: Diamond Color: silver Wheel Diameter: 60mm/2.36†Rod Shank Diameter: 3mm Max Speed : 20,000 RPM Grit : 80 Package includes: 1 x Grinding Slice, 1 x Rod.Made of powder alloy hot forming, high hardness, abrasion resistance, good impact resistance. Max Speed : 20,000 RPM. Color: silver. Anyway we will try our best to avoid this kind of thing.