A complete chart of Allen wrench sizes for both metric & SAE. View all the common hex key sizes that are seen in standard sets at Hand Tool Essentials.
Eklind Power Hex T-Key 11-Piece Set
Allen Wrench Sizes, Chart for Metric & SAE Hex Keys, Standard Sets
Allen Wrench/Key Size Chart
Folding Hex Key Set - 2 Piece, Metric and SAE 74205
Allen Wrench Sizes, Chart for Metric & SAE Hex Keys
50mm/100mm Length Hex Head Allen Wrench Drill Bit Set S2 Steel Metric
Allen Wrench Sizes & Dimensions - Inch/Metric
Basics 22-Piece Long Arm Hex Key Wrench Set - SAE/Metric
Allen Wrench - Electrical Engineering Centre