The Starrett ProSite Protractor takes error prone calculations out of the process of mitre cuts. Simply place the tool against the wall or other surface to be measured, read the angle off the tool and set your mitre saw to the same angle. Upside down or backwards the reading is always correct!
The Protractor has two scales the red scale and arrow show the angle for a perfect mitre joint, the black scale and arrow show the angle to fit a single work piece to an angle.
The ProSite Protractor saves time, reduces waste and is ideal for carpenters, plumbers, and all building trades that require the measuring and transferring of angles.
Two sizes of protractor are available, a 300mm/12" standard version or a smaller 175mm/7" version for use in confined spaces. For regular users of the 300mm/12" model, a durable leather belt holster is also available.