Product description:? Extra Diamond layer for longer life and use.? Thicker disc for strength, durability, and less heat.? Higher rpm speeds to be used on more faster machines.? Harder embedded grit not coated like disks on eBay.? Both sides of the disc are covered for maximum life and use .? Embedded Diamond grit so wont flake, brake or spin off.Material: Electroplating silicon carbideSpecifications:100mmThickness:1.6mmInner hole:20mmMax RPM:14500Packing list:1 Diamond cutting discNote:1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.