Description:Designed with anti-slip back, this straight ruler is convenient for you to measuring during woodworking or drawing.Anti seepage design, using this measuring ruler can avoid ink penetration caused by the phenomenon of ink drag.Made with aluminum alloy material, this product is anti-rust and wear resistant.There are three sizes for you to choose from.It is specially used for the positioning and marking of woodworking tenon and tenon joints, which is very suitable for drawing, woodworking, design and so on.Item Name: Measuring Straight RulerMaterial: Aluminum AlloyFeatures: Lightweight, Portable, ConvenientMeasuring Range: 20cm: 0-20cm, 30cm: 0-30cm, 45cm: 0-45cmSize Details: 20cm Size: 21cm x 3.5cm x 1.25cm/8.27" x 1.38" x 0.49" (Approx.)30cm Size: 31cm x 3.5cm x 1.25cm/12.2" x 1.38" x 0.49" (Approx.)45cm Size: 46cm x 3.5cm x 1.25cm/18.11" x 1.38" x 0.49" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Measuring Straight Ruler