1、Premuim Quality: The 8.5 inch long graduated bar is made of sturdy stainless steel, the stair gauge is made of aluminum alloy, all parts are corrosion resistant. High quality materials made for the product can guarantee years of longtime use. 2、Time Saving Scribe Tool: Stainless steel ruler with laser scale mark, hex marking gauge, which will help you lay out lines parallel to a flat wood surface with max accuracy and indicate exactly where wood needs to be cut. 3、Precise Line Marking Tool: The super clear laser engraved graduation marks on the bar are available in both metric and imperial versions up to 7 inch/180mm, which will help you lay out lines parallel to a flat wood surface with max accuracy and Indicate exactly the distance. 4、Stair Gauge Attachment Jigs: The jig could also fix the ruler, triangle ruler, or clamped onto framing squares, for stair layout, rafter layout, marking repetitive angles, or as a rip guide on your saw. 5、Easily One Handed Operation: Fast setting the distanse and one hand to marking, convenient to do your woodworking cutting.