Alumicolor Straightedges with Center Finding Backs are really two rulers in one. The front side is calibrated in inches and millimeters while the back side has center finding calibrations in inches. They have ultra smooth edges and photo anodized calibrations that are resistant to cleaners and will not rub off. Made of sturdy, rigid aluminum they are 1/16" thick by 1-1/8" wide. The 30" length is 1/8" thick by 1-1/4" wide.

Transparent, handy 8ths graph ruler calibrated in 16ths of an inch and beveled to accommodate work with ink. Zero centering scale. Laminated for durability.

This hard-grade aluminum construction ruler features a 0.080" thick blade that has been polished and anodized. One edge is graduated in 8ths to the inch with millimeters on the other edge. The reverse side of the stick provides metric conversion tables in length, area, mass, volume and temperature. Convenient hang holes at each end. 1-1/8" x 39-3/8", 5 oz.

These curves will hold any shape with a minimum radius of 1". One edge has a raised lip for inking.

Finds the center of any 2- or 3-dimensional object. Eliminates calculating and the need for dividers. Aluminum, with increments in 16ths and 32nds plus and a standard ruler along the bottom edge.
**Discontinued or unavailable. Stock is limited

Light-weight with easy-to-read numbers. Precision-calibrated in 16ths and 8ths.
**Discontinued or unavailable. Stock is limited