Kincrome Hex Key Wrench Set 30 Piece Imperial & Metric HKW30Manufactured from 6150 Chrome Vanadium Steel (Cr V), hardened, tempered and chemically blacked The long arm is particularly useful for working in confined spaces and varies in length from 65mm on the 0. 7mm 0. 028" through to 170mm on the 10mm 3 8" size Packed in plastic case Sizes: 0. 7, 0. 9, 1. 3, 1. 5, 2. 0, 2. 5, 3. 0, 4. 0, 4. 5, 5. 0, 5. 5, 6. 0, 7. 0, 8. 0, 10. 0mm Short Arm 0. 028, 0. 035, 0. 050, 1 16, 5 64, 3 32, 7 64, 1 8, 9 64, 5 32, 3