This is a Jack Richeson Cel Edge T-Square that has a clear acrylic edge. It lightweight, portable and economical, and designed for durability. This t-square comes with raised edges which makes inking much easier. The black lacquered wood head has a nice finish and is resilient to wear and tear and usage damage. The blade is composed of plain hardwood, however the wood is nicely finished and designed to withstand multiple uses. Made with the same high quality that Richeson Art uses for all of its art products, and a high quality t-square is an important tool for any serious artist to have.