Product uses three of its adjustable grooves to accommodate three standard 1.5" (1-1/2)"/1.75" (1-3/4)"/2.0" wide wood blocks Product is suitable for 16-inch or 24-inch spacing building frames. You can easily build a frame with very standard spacing by just clamping the wood in place. Can be used to build walls, floor supports, roofs and ladders Non-standard wood is also available and can be adjusted at will. It achieves a very standard state of parallelism or perpendicularity between timbers, helping you build a very stable frame The design of the more convenient handle is convenient and ergonomic, and the lighter weight makes your work easier Modular design, easy to place in the box when idle, saving storage space JMSMSH 16"/24" Framing Tool, Wall Stud Framing Tool,Center Framing Spacing Tool, Precision Measurement Fixture Tool for Framing Walls, Roofs, Floors, or Ladders