Feature 1Hexagonal Shape: The hexagonal shape design fits better on the edges, can be completely perpendicular to the material, providing stable and accurate clamping for workpieces. 2Thumb Screw: The stair gauge comes with a black stainless steel thumb screw that is anti slip, durable, and easy to grip and tighten onto any rafter, even when wearing gloves. 3Main Applications: The stair gauge is mainly used for designing stair and beam structures. Its compact size makes it easy to store and transport. 4Practical in Use: Gives you an accurate framing jig and very precise layout, sturdy structure helps ensure the strength and durability. 5Quality Material: The stair gauge is made of high strength aluminum alloy material with an anodized surface that is wear resistant, corrosion resistant, and durable.Item Type:StairGaugeKnobMaterial:AluminiumAlloy .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Purpose: RafterGaugeClampPackage List1 x StairGaugeKnob