Bon s 6 in. x5 in. Plexiglass InsideStepTool is the perfect tool for edging...Bon s 6 in. x 5 in. Plexiglass Inside Step Tool is the perfect tool for edging concrete slabs. Its unique plexiglass design prevents burn marks and is easy to clean. It also features an ergonomic comfort wood handle along with a 3/4 in. Radius.more