MARSHALLTOWN Plastic Power Trowel Blades are ideal for floating and finishing any concrete slab where burnish marks are a concern while also providing a hard, polished finish. Choose between a UHMW or a High-Density blade to suit your needs. The UHMW blades are intended for use with walk-behind Power Trowels while the High-Density Blades can be used with either ride-on or walk-behind Power Trowels. Both blade options are available in either an 8” x 14” or 8” x 18” size. These Power Trowel Blades are Made in the USA with Global Materials.