Center Finding Ruler Replaces Complex Calculations
This 12 inch stainless steel center finding ruler quickly and accurately finds the exact center of circles, squares and rectangles without tedious mathematical calculations. A valuable tool for woodworking, graphic arts and model making. Easy to use...simply equalize the readings on each side of zero and mark the center at zero. Reverse side has conventional scale graduated in 64ths and 32nds. 1 inch wide x 12 inches long.