Alvin Adjustable Triangle w/ Inking Edge 10"

Rise and slope graduations. Inking edges on all three sides. Hot-stamped graduations. Thumbscrew locks triangle securely at desired angle. 0.12" thick, light blue, optically clear acrylic. Detailed instructions included.
Versatile Usage - Ideal for calculating length and distance in classrooms and professional applications. Features an optically clear acrylic body for easier and more accurate measuring.
Thumbscrew Lock Mechanism - Use the thumbscrews to keep and adjust the angle you want locked securely in place at your desired rise, slope or angle.
Includes Rise and Slope Graduations - Comes with premium hot-stamped graduations that will not rub off or wear with extended use, making this a reliable tool for many projects to come.
Detailed Instructions Included - Helpful instructions are provided to simply guide even first time users on proper and efficient use.
A Professional\"s Choice - Alvin has been the professional\"s choice for drafting tools and drawing supplies for over half a century. Since 1950, we have brought quality and value to our customers."