This protractor can be attached to height gages for additional flexibility of measurements
Set includes 3 blade lengths: 6 inches, 8 inches, and 12 inches
Acute angle attachment (included) can be used with 6-inch, 8-inch, and 12-inch blades
Reading dial has satin chrome for easy reading (dial graduations of 1 degree)
Hardened stainless steel construction for long life and protection against rust and wear; Flush reading, no paralax error. Fine adjustment knob for measuring or setting minute angles.