The bumper

or mud mix at the proper speed

A 5' blade of high-grade aluminum alloy forms the base of the tool

Both the front and the back edge of the groover are curved up to avoid any gouging while in use

8" x 24" Cast Aluminum Airplane Groover, Round End, 3/4" Bit with EZY-Tilt II Bracket Crain Vinyl Welding Kit The bumperAirplane groover cuts clean, smooth professional control joints every time. Made from the highest quality of cast aluminum with a broken in face. Both the front and the back edge of the groover are curved up to avoid any gouging while in use. The tool creates a groove in wet cement to control expansion and contraction and relieve stress points. This 8" groover features a bit that has a 3 8" radius and is 3 4" deep and 7 8" wide. The single piece