1. Specifications: stainless steel ruler: length 33cm, width 2.7cm + brass stopper. 2. EASY TO USE: The brass positioning block can be placed in the desired location, just tighten the easy-to-use screws. Can be used with all types of steel rulers. Using a steel ruler, all measurements can be made with high precision in the measuring range of 0-30 cm. 3. Dual Scales - Woodworking marking tools are marked with 2 different scales on the front and centimeters and inches on the back to meet different measurement standards. 4.Material: The office ruler is made of durable, unbendable stainless steel, but with a little bit of elasticity for durability, the markers are embedded in the metal so they won't wear out over time. 5. Perfect combination: woodworking scale, positioning block, parallel ruler, stainless steel ruler, brass stopper. You can save a lot of time simply by transferring the measured values. Highest precision.