The QEP Grout Float features a nonstick gum rubber to ensure grout is applied smoothly. The 2 rounded corners and 2 square corners help prevent gouging the grout and help you spread grout into tight areas and corners. Large wood handle for easy handling. Non-stick gum rubber ensures smooth application2-rounded corners prevent gouging of grout joints2-square corners ensure complete grout coverage in cornersThick aluminum backing plate resists bendingGrout float9-1/2" x 4"