Features1Main Application: Stair gauges are mainly used for height measurement of square attachments to stair layout frames.2Easy to Use: You can see the ruler markings simply by inserting the stair gauge into the groove, increasing the field of view.3Aluminum Alloy: The stair gauge is made of anodized aluminum alloy, which has good hardness and wear resistance to ensure its longevity.4Red Stair Gauge: The red stair gauge knobs is an eye catching color that you can easily attach to any square frame or rafter.5Hex Shape: The hex flat design of the stair gauge makes it have bigger friction, which can be better and more stable to fix the square frame.SpecificationItem Type: Stair GaugeMaterial: Aluminum alloyColor: RedPurpose: Tall stair gauge for square attachment to stair layout framesPackage List2 x Stair Gauge