MK Diamond 166067 MK-301 Gemking 8-Inch Lapidary Wet Cutting Diamond Blade 8 by .040 by 5/8 inch Lapidary blade MK-301 Gemking Redesigned with a greater diamond concentration and a higher carbon content steel core for improved tension memory Provides superior cutting performance for hard materials such as agate, petrified wood or jade Wet cutting for longer blade life and protection of valuable project materials Greater diamond concentration for faster cutting Carbon steel core for better tension memory Solid diamond kerf provides superior cutting performance and improved coolant flow