CRAIN 835 HEAVY-DUTY UNDERCUT SAWThe improved No. 835 Undercut Saw Kit replaces the No. 825 Saw with 60% more power! This powerful saw has a larger 6 1 2" diameter blade that can undercut doors in place, and comes with a masonry blade for undercutting hearths. A diamond blade (No. 822) is available for undercutting tile and stone. Other enhanced features include a more powerful, lower RPM motor that throws less dust, dust control port, threaded rod height adjustment that will not