Shark Industries Ltd BT13 Cylinder Shape Bur-Solid Carbide 1/4 x 3/4 x 2 Diamond Cut is a cylinder shape bur-solid carbide that is 1/4 x 3/4 x 2 in size. This cylinder shape bur-solid carbide is made of diamond cut and has a hardness of 58-59 HRC. This cylinder shape bur-solid carbide is ideal for use in applications that require a high level of hardness and durability. Shark Industries Ltd BT13 Cylinder Shape Bur-Solid Carbide 1/4 x 3/4 x 2 Diamond Cut is a cylinder shape bur-solid carbide that is 1/4 x 3/4 x 2 in size. This cylinder shape bur-solid carbide is made of diamond cut and has a hardness of 58-59 HRC. This cylinder shape bur-solid carbide is ideal for use in applications that require a high level of hardness and durability.