BlueSpot 32PCE Metric/Imperial Assorted Spanner Set (6-19mm)(1/4"-5/8") The BlueSpot 32PCE Metric/Imperial Assorted Spanner Set is manufactured from chrome vanadium steel, heat treated and nickel plated for increased durability. The set comprises of a range of wide range of metric and imperial spanners, it also includes a useful carrying case for quick and convenient storage. Fully polished mirror finish. Package Contents - Combination spanners: Metric: 6, 7, 8, 9, 10, 12, 13, 15, 17 & 19mm. Imperial 1/4", 5/16", 11/32", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16" & 3/4". Stubby spanners: Metric: 10, 11, 12, 13, 14 & 15mm. Imperial: 5/16", 3/8", 7/16", 1/2", 9/16" & 5/8". To activate the manufacturers lifetime guarantee, you will need to register the product on the Bluespot website within 30 days of purchase.