28-in-1 universal ratcheting box end. Chrome vanadium steel. Fully polished for professional appearance. Lifetime warranty. 63 sizes - includes 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" 6-point and 12-point; 8mm, 10mm, 11mm, 13mm, 14mm, 16mm, 17mm, 19mm 6-Point, 12-Point and Spline; E10, E12, E14, E16, E18, E20, E22, E24 Star; 9/32", 11/32", 3/8", 7/16", 15/32", 17/32", 9/16", 5/8" Square; 7mm, 9mm, 11mm, 12mm, 13mm, 14mm, 16mm Square.