Sheet metal is made from different materials and comes in various thicknesses, known as gauges. An easy way to remember sheet metal thickness is that the higher the gauge number, the thinner it is.

HVAC professionals working with sheet metal, ductwork, and tubing need tools proven to ... metalworking, woodworking, and masonry applications. The 12V MAX* lithium ion battery included with each tool ...

For example, consider a 20-gauge (0.036-in.) low-carbon steel sheet that must be bent 75 deg. with an inside radius of 0.093. Bend allowance is needed to determine raw material requirements.