This 8" x 5" 1/4"R 3/4"D walking groover features an adjustable threaded handle socket that accommodates threaded bull float extension handles. With a thickness of 0.12", rivet less finish, stainless steel blade type, and 1/2" bit width and 3/4" bit depth, it's perfect for completing projects with a 1/4" radius and a blade length of 8".