Simple and reliable, this joint jigger quickly and accurately notches 4130, stainless steel, or other tubing and pipe up to 2″ diameter. Its design allows it to both clamp the tubing in place and feed the saw smoothly into the work. Its hardened steel arbor accepts any bi-metal, high-speed hole saw from 9/16″ to 2″ (not included) Back plate can be anchored to bench top by clamps, bolts or vice and features an engraved graduated protractor for notches up to 60 degrees. Requires a 1/2″ chuck hand drill. Industrial quality steel back plate.