The Sky Ruler scaling tool is a convenient, snap together 5 Ft x 1 Ft scaling constraint. 5 precise - 1 Ft sq tiles, alternating orange and black are very easy to locate for scaling. Collapsed, Sky Ruler comes in a 12" x 12" x 3" rugged carry bag.
5 Ft x 1 Ft orange and black Scaling Constraint
Contrasting colors are easy to locate
5 precise 1 Ft Square quick snap interlocking tiles
Made of extremely durable hard thermoplastic polymer