pLACKMOND Diamond Blade, Laser Weld Segmented Tuck Point, Series PRM Series, 4 in Diameter Blade, 58 to 78 in ArborShank, 38 in Cutting Width, DryWet Cutting Condition, 10 mm Segment Height, 38 in Kerf, 15000 rpm Maximum, Applicable Materials Brick, Mortar, Masonry and StoneppThe PRM Series tuck point blades are our mid range offering and combine high performance with a competitive price They are designed to grind out and repair mortar joints in stone or brick masonry walls The PRM tuck point blades provide very fast, clean cuts in mortar grout joints and work well in both harder and softer aggregatesp