Strong tubing joints depend on precisely cut tubing. Trying to fill a poor joint with a thick weld bead not only looks bad, but can lead to disastrous joint failure. These tubing notchers can help make tight, precise joints in tubing up to 2in. in diameter. Hole Saw Kit makes clean, safe cuts in tubing. The Hole Saw Kit includes 1in., 1 1/8in., 1 1/4in., 1 3/8in., and 1 1/2in..