Chartpak® Adjustable Triangular Scale for Architects Versatile design lets architects work with maximum efficiency. Change units by rotating dial at either end of scale without moving scale from work surface. 12" 1/32 scale. Exact calibrations. Highest quality aluminum. Adjusts to 1/16, 1/8, 1/4, 1/2, 1:1, 2:1 and 32.

Chartpak® Adjustable Triangular Scale for Engineers Designed for the exacting needs of engineers. Change units by rotating dial at either end of scale. Exact calibrations. Highest quality aluminum. Adjusts to 10, 20, 40 and 50 parts to the inch.

Staedtler® Triangular Scale for Architects Accurate and versatile. Three sides with six different scales. Open divided: 3/32, 1/8, 3/16, 1/4, 3/8, 1/2, 3/4, 1, 1 1/2, 3" = 1 foot. Full divided: inches to 16ths. White plastic.

Staedtler® Triangular Scale for Engineers Triangular scale delivers precision and versatility—three sides with six different scales. Full divided: 10, 20, 30, 40, 50 and 60 parts to the inch. White plastic.

Charles Leonard® Open Center Protractor Clear plastic protractor is ideal for all young mathematicians. Sharply defined graduations allow students to easily identify angles ranging from 1 to 180 degrees.

Westcott® Student Protractor with Antimicrobial Product Protection A school tool designed with students in mind. Features a movable arm for greater accuracy. Soft touch grip and non-skid backing for better control. Protractor contains an antimicrobial agent to help inhibit the growth of bacterial stains and odors. Protractor will be blue, gray, green or pink.

Chartpak® Triangular Scale Made of plain white high grade molded plastic. Measurements are printed clearly on the plastic face.

Chartpak® Color-Coded Triangular Scale The color coded center groove easily identifies scale graduations. Measurements are precision-etched into a durable laminated plastic for accuracy. Comes in a protective case.

Staedtler® Mars® College Protractor Tinted transparent plastic and beveled center opening for easy pick-up. Protractor features graduations in 1/2 degree increments reading right to left and left to right.

Westcott® 180 Degree Protractor Clear protractor is perfect support for educational and creative activities. Sturdy plastic construction for durability and does not corrode after exposure to outdoor elements.

Staedtler® Mars® College Combination Set Four-piece set of the most popular mathematical instruments. Tinted plastic provides excellent visibility and is ideal for students of higher math, drafting and engineering. Protractors and squares feature beveled center openings.

Staedtler® Xcellence Mathematical Instrument Set Everything needed for higher-math classes—this precision instrument set is ideal for serious high-school and college students. Handy metal storage case features imprinted conversion tables and geometric theorems.