Protractor Triangle-Deluxe - Celestaire, Inc.

Helix - Swing Arm Protractor - 180 Degree Rotation

Divider and Rulers – MORBAI

With bevels on all four sides; springs built in the bearings ensure a smooth motion which is critical in parallel rule operation.Cork disks on the

Brass Graduated Parallel Rules

Helix - Swing Arm Protractor - 180 Degree Rotation

With its large, easy-to-use scale, this 12 wide protractor is an effective layout tool for accurately reading, marking or transferring angles., It is

Crucible Big Protractor

Bi-Rola Rule - Celestaire, Inc.

2010 Celesta Ire Catalog, PDF, Navigation

Compass/Protractor - Safety and 6 Swing Arm Protractor, Assorted C

These professional triangles from Staedtler Mars feature precision-cut straight edges for pencil work and a beveled center with a cut-out finger lift.

Staedtler Triangle 8 in 45 Degree Clear

Helix - Swing Arm Protractor - 180 Degree Rotation