Lengthened size-Perfect for stair stringers layout,rafter layout,etc.Easy layout on any material,especially when there are Crevice in the edge of the wood.Patented product.Recessed cutout-Align with the ruler marks on the frame ,the ruler marks can be seen through the concave cut when the gague is fully inserted,increase field area.Dedicated -The gauge is equipped with steel wire rope to a dedicated place to prevent loss.They are also very light and easy to store.It can be hung on the work bag,magnetic tool panel and rack.Made of anodized aluminum alloy.Hexagonal plane is more frictional and can work better.Multiple functions-Stair stringers and Rafter layout - Rip for circular saw - Framing attachment - Using on to mark repetitive angles - Using on to saw to make angle cutsMaterial:Aluminum alloycolour:bluePackage Contents:2 * Auxiliary Clip RulerOnly the above package content,other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing.The measurement allowed error is +/- 1-3cm.