QLT By MARSHALLTOWN 3769 1/2-Inch Radius, 5/8-Inch Lip 9-Inch by 12-Inch Blue Stainless Steel Walking Edger Made of heavy gauge blue steel Use our No.9 or No.10 handle Two-way handle attachment allows for 180-Degree movement Used to produce a radius at the edge of a concrete slab to help prevent the edge from chipping off