Robot® Point FG Diamonds. The robotic manufacturing process distributes precise amounts of natural diamond particles onto a one-piece, stainless steel shank. The optimal proportion between the projected and the bonded part of the diamond particle ensures a smooth-cutting and long-lasting performance. Besides the standard grit (plain shank), a selection of fine grit (F, red-banded shank) and coarse grit (C, green-banded shank) are available. Choose from 70 popular FG shapes. Packaged individually. NEW Robot Technique Diamonds are distinguished by a yellow-banded shank for fine grit, and a plain shank for coarse grit.