A selection of useful scales is now available in a convenient, go-anywhere size. Each tape measure has three 24" coiled rule tapes inside, each with its own non-slip toggle lock and spring action return. Uniquely shaped plastic body. Architect model has 12 graduations: 16,1, 1⁄2, 1/16, 1⁄8, 1/4, 11/2, 3, 3⁄4, 3⁄8, 3⁄16, 3⁄32. Engineer model has 6 graduations: 10, 50, 40, 20, 60, and 30.