Heavy Duty Concave Root Saw Blade with Adapter Rod and Coupling Category_Default Category Products Manhole Tools Sewer Camera Hooks The tubing handle has three STC 1 2 14 The tubing handle has three sliding lockable sections that are adjustable to any size you want to the maximum of either 15’ or 24’ You see we use our super thick 3 16” thick alloy steel heat treated laser cut saw blades and attach sharp carbide teeth to every 5th tooth on the front cutting edge and every 10th tooth to the rear back edge All of our saw run about ½” undersized to ride up and over offsets Eventually these will wear out but not after you have cut miles and miles of roots