A wide U-Gullet design, engineered cooling holes, and a high number of segments to deliver more aggressive cutting at an extremely fast speed. For concrete, block, bricks, pavers, and stone. Commonly used by general masonry or tuck point contractors. High diamond concentration, tungsten carbide bond, and 12mm segment delivers maximum longevity. Come brazed, polished, sintered, cooling holes, sandwich core design, key hole gullet, v-segment, and wide u-gullet . Used for tuck pointing or re-pointing, which is the removal of mortar joints and the preparation of masonry surfaces . Professional quality, split-segment “speed” tuck pointers deliver fastest mortar removal rates on hard masonry materials