Concave root saws for your sectional rodding machines. The heaviest duty concave root saws available and these are made of 3/16? alloy heat treated steel for increased strength and durability. The come in all sizes for you sewer line and also with a 5/16? or a 3/8? adapter rod included. They provide great cutting and ripping of roots with the laser cut teeth. The concave shape allow the steel to stay off the pipe wall for great safety. We provide a nice smooth radius between the teeth so no weak points are developed. The best saw that money can buy. Remember these and all our saws are fully warranted against defects of manufacture and workmanship. Eventually these will wear out but not after you have cut miles and miles of roots. All of our saw run about 1?2? undersized to ride up and over offsets.