This is the first working prototype of many, a protractor adapter for your standard 18 cork backed ruler. It adds a pivot point along its…

Breman Precision Metal Ruler 18 Inch - Stainless Steel Cork Back Metal Ruler - Premium Steel Straight Edge 18 inch Metal Ruler - Flexible Stainless Steel Ruler - Imperial and Metric Ruler

Ruler

Feickert Next Generation Universal Protractor

Precision You Can Rely On - We designed each precision cork back ruler with the measurement markings to be clearly etched in the stainless-steel ruler

Breman Precision Metal Ruler 18 Inch - Stainless Steel Cork Back Metal Ruler - Premium Steel Straight Edge 18 inch Metal Ruler - Flexible Stainless

Open Center Protractor, Plastic, 6 Ruler Edge, Clear - National Office Works, Inc.

Premium Drafting Ruler made from high quality stainless steel.Stronger and more durable than aluminum, this architect ruler ensuresreliable durability and accuracy. Graduated in 32nd and 1/16th divisions.

Pacific Arc ME18 Stainless Steel Cork Back Ruler inch / Metric 18 inch

What is a protractor tool?

180 Degree Protractor Semicircle Wooden Drawing Measuring Tool for Teaching Dry Erase Board

213533A Woodward Propeller Synchronizer (28V)

180-Degree Straightedge Rotating Angle Measure Protractor Ruler, 15cm By Houseuse

Six inch transparent protractor., Features rounded corners, tapered edges, and dual scale for measuring both left- and right-opening angles. Shatter

Protractor

Precision You Can Rely On - We designed each precision cork back ruler with the measurement markings to be clearly etched in the stainless-steel ruler

Breman Precision Metal Ruler 18 Inch - Stainless Steel Cork Back Metal Ruler - Premium Steel Straight Edge 18 inch Metal Ruler - Flexible Stainless