Guilty Gadgets &reg; - 20 Pc Allen Alan Allan Hex Key Wrench Set 1.5-8mm Metric 1/16"-5/16" Imperial Af Metric Sizes 1.5 2.0 2.5 3.0 3.5 4.0 5.0 5.5 6.0 8.0mm Imperial AF Sizes 1/16 5/64 3/32 1/8 5/32 3/16 7/32 15/64 1/4 5/16" Inch