Flange Separating Bolt Saw developed by Francis Torque Service cuts bolts between flanges or cuts nut or bolt heads at surface of the flange without damaging the flange. Cuts 1-7/8″ diameter bolt in under 3 minutes. Saw is secured to flange with a heavy duty strap and binder. No special tools or flange adapter required. Saw will fit virtually any size flange. Set up in minutes. No Spark.