13 Pc Metric Mm Hex Allen Bit Heavy Duty Socket Set 13pc Hex Bit Socket Set; MM Specification *1/4",Dr: 2; 2.5; 3; 4; 5; 5.5; 6mm X L 37" mm *3/8Dr; 7; 8; 9; 10; 12mm X L 48mm *1/2"" Dr: 14mm X L 55mm *Cr-V Mirror Polished Socket And S2 Bit case Color Will Vary