Complete set has every size from 5/16 to 3/4 inch and 8 to 19 mm in both deep and standard lengths, 6-point sockets apply force to flat sides of fasteners and not the corners, preventing round-off, Extra large die-stamped size marking is easy to read and can’t wear off, Polished, chrome-plated finish is easy to clean and highly resistant to corrosion, Finely geared 90-tooth ratchet needs only a 4-degree working swing arc.