Klein Tools' 22-Key Hex Key Set conveniently consolidates the most popular metric and SAE sizes into one convenient set. The flexible folding case ensures easy access to keys while providing sleek and adaptable storage options when interlocking SAE and metric cases together. Each key is heat-treated and coated in black phosphate for unparalleled strength and corrosion resistance.

• L-style hex keys in convenient 22-Piece combination set with sizes 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8-Inch, 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, and 10mm
• Hex keys are heat-treated and tempered for added strength and durability
• Rust resistant black phosphate coating on every key
• Chamfered ends for high engagement with fasteners
• Secure storage with internal locking mechanism to prevent loss of keys
• Twist-to-Lock case for hassle-free hex key removal
• Cross-compatible, interlocking cases for sleek and convenient storage to stack with other Twist-to-Lock cases