This combination square is mainly made of stainless steel and zinc alloy, sturdy and durable. The engraving calibration is clearer and easier to read. Multifunctional, detachable and portable, it is a professional measuring tool for engineers. Features: With its stainless steel ruler and alloy base, the angle ruler is sturdy and durable. The calibration is clear and accurate and does not fade easily. Measuring range from 0 to 300 mm, adjustable to measure right angle, 45° angle, 45° slope, length, depth and width. The level gauge design facilitates accurate measurement. Easy to use, it is a professional measuring tool for engineers. Only the black color model is equipped with an additional center gauge and protractor, making it more practical and convenient. Note: 1. Please allow 0-2 cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the actual item as reference. Condition: 100% Brand New Material: Stainless Steel + Zinc Alloy Color: Yellow, Black (Optional) Measuring Range: 0~300mm Total Size: Approx. 30.5*12cm / 12.01*4.72in Weight: Approx. 190~386g Package Includes: 1 X Combination Square