Feature: 2 Kinds of Proportion Marked For Hardwood or Softwood,1:5 slope for softwoods and 1:8 slope for hardwoods. Accurate Dovetails Layout,CNC machined aluminium . Great Handy Little Tool for woodworker, easy to mark out accurate dovetails . Making lay out the angles simple and precise,easy to use. Specification: Material: Aluminum Alloy Size: As the picture show Package include: 1pc Brand Unbranded MPN Does Not Apply UPC Does not apply Material Aluminum Alloy .