C-Thru

8" Adjustable Triangle allows drawing of angles from zero to 90° with a steel screw knob that secures the triangle's position. Inner graduations on the arc give degrees of one angle while...

C-Thru Graph Rulers have an 8ths graph ruler calibrated in 1/16" along the edges and beveled to accommodate work with ink. Includes a zero centering scale. 2" wide. Made from transparent...

C-Thru's Junior T-Square is made from clear plastic with inch and metric calibrations. Easy to see through to underline notes, draw rows or check the layout of your paperwork. 18" long.

Transparent plastic ruler calibrated in tenths of an inch and millimeters, with a zero centering scale. Edges are beveled to accommodate work with ink.