MK Diamond 168536 MK-301 14 by .080 by 1 inch is a lapidary blade. MK-301 Gemking. Has been redesigned with a greater diamond concentration and a higher carbon content steel core for improved tension memory. The solid diamond sintered kerf provides better cutting performance and improved coolant flow. The MK-301 provides superior cutting performance for hard materials such as agate, petrified wood or jade.