Made of high-quality aluminum alloy, the is anodized, the structure is stable, strong and , not easy to break or deform. Product Function: The bracket has a hexagonal plane, which is more suitable for borders than a circle. Make the ruler perpendicular to the material, making your marking more precise. All-Around Stair Gauge Tool: your carpentry projects with these incredibly versatile stair gauges. They're a as an add-on for your trusty frame square. Whether you're installing stairway , making repeated marks at multiple angles on a miter square, or guiding a circular saw to make precise angle cuts, this stair gauge has you covered, Manufacturer: Akfldms