Features 1、Excellent Aluminum Alloy: This marking ruler is made of excellent aluminum alloy, which is strong and durable, not easy to wear, and has a long service life. 2、Anodized Surface: The surface of this ruler is anodized to prevent color fading, and the laser processed scale is clear and easy to read. 3、Threaded Holes: This scribing eating ruler has threaded holes that can be configured with T straight limiters for both left and right ends of the ruler, both of which can be installed. 4、Chamfering Rounding: The edges of the full ruler are chamfered and rounded, no incisive corners, which can prevent scratches. There is also a hanging hole design, easy to store. 5、Wide Application: This ruler is versatile and can be used by engineers, carpenters, student drafters and other professionals. Specification Item Type: Scribing ruler Material: Aluminum Alloy Color: Black Use: Widely used by engineers, carpenters, students of drafting and other professionals. Package List 1 x Scribing Ruler 1 x Limiters 1 x Wrench 4 x Screw